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Birds of Rocky Mountain National Park

This list includes 260 species which have been reported for this region, including Rocky Mountain National Park, Arapahoe National Recreation Area, Estes Park, and Granby. It is arranged according to the 6th Edition of the A.O.U Check-list. The park naturalist office would appreciate receiving details of any unusual observations.
 
Missing codes indicate a lack of documentation.

TIME OF OCCURRENCE
 Multiple listings reflect descending order of abundance.
 
 1 - All year
 2 - Summer
 3 - Winter
 4 - Migrant (fall, spring; late summe visitor)
 5 - Irregular Visitor
 

CHANCE OF SEEING
 Multiple symbols reflect notable population changes from year to year.
 
 * - Commonly Encountered
 & - Fairly Common
 ^ - Uncommon
 # - Rarely Encountered
 

PREFERRED HABITAT
 Codes are listed in order of frequency used. Seasonal changes are indicated by combining habitat with time of occurrence.
 
 A - Aspen
 B - Wet Brushland (willow); Marshland
 C - Coniferous Forest
 D - Douglas-fir
 E - Cosmopolitan
 F - In Flight
 G - Grassland, Meadows
 H - Rocky Sites
 K - Krummholz (Wind Timber)
 L - Lodgepole Pine
 M - Dry Brushland (incl. W. Slope Sage)
 P - Ponderosa Pine
 R - Wooded Creekbottoms (esp. Cottonwood)
 S - Spruce Fir
 T - Tundra
 U - Urban & Ranches
 W - Aquatic Habitats (ponds, lakes, streams)

LOONS, GREBES                     Occurrence        Chance of Seeing        Habitat

___ Arctic Loon                             5                    #                   W
___ Common Loon                       4                    ^                   W
___ Pied-billed Grebe                   4                    ^                   W
___ Horned Grebe                        4                    #                   W
___ Red-necked Grebe                 4                    #                   W
___ Eared Grebe                           4                    ^                   W
___ Western Grebe                      4,2                  &                   W 

          
PELICANS, HERONS, ALLIES         Occurrence        Chance of Seeing        Habitat

___ American White Pelican             4                    #                   W
___ American Bittern                      4                    #                   W
___ Least Bittern                            4                    #                   W
___ Great Blue Heron                     4,2                  ^                   W
___ Snowy Egret                            4                    #                   W
___ Green-backed Heron                4                    #                   W
    (Green Heron)                                                           
___ Black-crowned Night-Heron       4                    #                   W                
___ White-faced Ibis                       4                    #                   W

SWANS, GEESE, DUCKS               Occurrence        Chance of Seeing        Habitat

___ Tundra Swan                              4                    #                   W
    (Whistling Swan)              
___ Greater White-fronted Goose       3                    #                   W
___ Snow Goose                               3                    #                   W        
___ Canada Goose                            4                    ^                   W       
___ Wood Duck                                                       #                   W     
___ Green-winged Teal                     4,2,3                &                   W
___ Mallard                                      2,3,4                *                   W
___ Northern Pintail                           4,3                  ^                   W
___ Blue-winged Teal                         4,2                  &                   W
___ Cinnamon Teal                            4,2                  ^                   W     
___ Northern Shoveler                       4,2                  ^                   W        
___ Gadwall                                     4,2,3                ^                   W      
___ American Wigeon                        4,3                  ^                   W        
___ Canvasback                                4                    #                   W        
___ Redhead                                    4,3                  ^                   W        
___ Ring-necked Duck                        2                    &                   W        
___ Lesser Scaup                              4,3                  &                   W
___ Oldsquaw                                    3                    #                   W
___ White-winged Scoter                    4                    #                   W        
___ Common Goldeneye                    3                    *                   W
___ Barrow's Goldeneye                    3,4                  &                   W          
___ Bufflehead                                 4,3                  ^                   W        
___ Hooded Merganser                      3,4                  ^                   W      
___ Common Merganser                   3,4,2                &                   W        
___ Red-breasted Merganser              4                    ^                   W
___ Ruddy Duck                               4,3                  ^                   W

VULTURES, HAWKS, EAGLES           Occurrence        Chance of Seeing        Habitat

___ Turkey Vulture                            4,2                  ^                   F        
___ Osprey                                       4,2                  ^                   W       
___ Bald Eagle                                   3                    ^                   F,W       
___ Northern Harrier                          4,1                  &                   F,G,T
    (Marsh Hawk)
___ Sharp-shinned Hawk                    4,1                  ^                   E,F
___ Cooper's Hawk                            4,1                  ^                   E,F
___ Northern Goshawk                        1                    &                   C,F
___ Swainson's Hawk                         4,2                  ^                   F,G,T
___ Red-tailed Hawk                            1                    *                   E,F
___ Ferruginous Hawk                         4                    ^                   F,G,T
___ Rough-legged Hawk                     3,2                  ^                   F,G,T
___ Golden Eagle                                1                    &                   E,F
___ American Kestrel                          2,1                  &                   E,F,G
    (Sparrow Hawk)
___ Merlin                                          4,2                  #
    (Pigeon Hawk)                                    
___ Peregrine Falcon                           4,1                  #                   F,G,T
    (Duck Hawk)
___ Prairie Falcon                                2,1                  &                   F,T,G

GROUSE, PTARMIGAN                 Occurrence        Chance of Seeing        Habitat

___ Chukar                                                              #
___ Ring-necked Pheasant                   1                    #                   G
___ Blue Grouse                                 1                    &                   A,C
___ White-tailed Ptarmigan                  1                    &                   K,T
___ Sage Grouse                                1                    ^                   M
___ Wild Turkey                                  1                    ^ 
___ Northern Bobwhite                                              #

RAILS, COOTS, CRANES              Occurrence        Chance of Seeing        Habitat

___ Virginia Rail                                  2                    ^                   W
___ Sora                                            2                    ^                   W
___ Common Moorhen                                              #                   W
   (Common Gallinule)                           
___ American Coot                            4,2,3                ^                   W       
___ Sandhill Crane                             4                    #

SHOREBIRDS                        Occurrence        Chance of Seeing        Habitat

___ Semipalmated Plover                                         #                   W        
___ Killdeer                                       2                    &                   W,G
___ American Avocet                          4                    #                   W              
___ Greater Yellowlegs                       4                    #                   W        
___ Lesser Yellowlegs                         4                    ^                   W        
___ Solitary Sandpiper                        4                    #                   W        
___ Willet                                           4                    #                   W        
___ Spotted Sandpiper                        2                    &                   W
___ Long-billed Curlew                        4                    #                   W,G,T
___ Marbled Godwit                             4                    #                   W
___ Western Sandpiper                        4                    #                   W       
___ Least Sandpiper                            4                    #                   W
___ Baird's Sandpiper                          4                    #                   W,T
___ Common Snipe                             2,4                  &                   W
___ Wilson's Phalarope                        4                    ^                   W
___ Red-necked Phalarope                   4                    #                   W
    (Northern Phalarope) 
___ Pomarine Jaeger                           4                    #                       
___ Franklin's Gull                               4                    &                   F,G        
___ Bonaparte's Gull                                                 #                   W        
___ Ring-billed Gull                           2,4,3                ^,&                 W
___ California Gull                               2                    ^                   W       
___ Herring Gull                                  3                    ^                   W
___ Forster's Tern                               4                    #                   W
___ Black Tern                                    4                    #                   W       

DOVES, PIGEONS, CUCKOOS           Occurrence        Chance of Seeing        Habitat

___ Rock Dove                                    1                    ^                   U
    (Common Pigeon)
___ Band-tailed Pigeon                         2                    &                   C,F
___ Mourning Dove                              1                    &                   G,P,T
___ Yellow-billed Cuckoo                                            #                   R       

OWLS                              Occurrence        Chance of Seeing        Habitat   

___ Flammulated Owl                            2                    #                   C
___ Eastern Screech-Owl                       1                    ^                   C        
___ Great Horned Owl                           1                    &                   E,P,R
___ Northern Pygmy                             1                    ^                   A,C,R
___ Long-eared Owl                              1                    ^                   C,A,R
___ Boreal Owl                                                           #                   S
___ Northern Saw-whet Owl                   1                    ^                   A,C

NIGHTHAWKS, SWIFTS               Occurrence        Chance of Seeing        Habitat

___ Common Nighthawk                         2                    &                   F,G,C       
___ Common Poorwill                             2                    ^                   G,P       
___ Black Swift                                      2                    ^                   F,H
___ Chimney Swift                                 2                    #                   F,U       
___ White-throated Swift                         2                    ^                   F,H  

HUMMINGBIRDS, KINGFISHER          Occurrence        Chance of Seeing        Habitat

___ Magnificent Hummingbird                  4,2                  #
    (Rivoli's Hummingbird)
___ Calliope Hummingbird                       4,2                  #
___ Broad-tailed Hummingbird                  2                    *                   E,C,R,U
___ Rufous Hummingbird                          4                    &                   E,C,R,U
___ Belted Kingfisher                               2,1                  &                   R,W       

WOODPECKERS                       Occurrence        Chance of Seeing        Habitat

___ Lewis' Woodpecker                            4                    ^
___ Red-headed Woodpecker                   2                    #                   A,R
___ Yellow-bellied Sapsucker                    2                    *                   A,B,R
___ Williamson's Sapsucker                      2                    &                   P,A,C
___ Downy Woodpecker                           1                    &                   R,A,C
___ Hairy Woodpecker                             1                    &                   C,R,A
___ Three-toed Woodpecker                     1                    ^                   S,A           
___ Northern Flicker                                 1                    *                   E

FLYCATCHERS                       Occurrence        Chance of Seeing        Habitat

___ Olive-sided Flycatcher                        2                    &                   C        
___ Western Wood-Pewee                        2                    *                   C,A,R
___ Willow Flycatcher                               2                    &                   A,B,R
    (Traill's Flycatcher)                    
___ Least Flycatcher                                 4                    #                   R,A
___ Hammond's Flycatcher                        2                    &                   C
___ Dusky Flycatcher                                2                    ^                   A,R,P
___ Western Flycatcher                             2                    &                   C,A,R,U         
___ Say's Phoebe                                     4                    ^                   U,G
___ Ash-throated Flycatcher                                            #
___ Cassin's Kingbird                                                     #
___ Western Kingbird                                4                    ^                   G,R,T 
___ Eastern Kingbird                                 4                    ^                   G       

LARKS                             Occurrence        Chance of Seeing        Habitat

___ Horned Lark                                      1,4                  *                   G,T       
___ Purple Martin                                                           #       
___ Tree Swallow                                      2                    *                   F,A,E
___ Violet-green Swallow                           2                    *                   F,A,U,E
___ Northern Rough-winged Swallow           2                    #                   G
___ Cliff Swallow                                       2                    &                   G,U       
___ Barn Swallow                                      2                    &                   U,G       

JAYS, CROWS, MAGPIES              Occurrence        Chance of Seeing        Habitat

___ Gray Jay                                            1                    &                   S,C
___ Steller's Jay                                        1                    *                   C
___ Blue Jay                                                                   #
___ Scrub Jay                                                                 #                   M
___ Pinyon Jay                                          5                    ^
___ Clark's Nutcracker                               1                    *                   C,T,F
___ Black-billed Magpie                              1                    *                   E
___ American Crow                                    1                    &                   E,F
___ Common Raven                                   1                    &                   E,F,G,T      

CHICKADEES, NUTHATCHES, CREEPER   Occurrence        Chance of Seeing        Habitat

___ Black-capped Chickadee                        1                    *                   R,A,P
___ Mountain Chickadee                               1                    *                   C,R,A
___ Red-breasted Nuthatch                           1                    &                   C,R
___ White-breasted Nuthatch                         1                    &                   C,R,A
___ Pygmy Nuthatch                                     1                    &                   P
___ Brown Creeper                                       1                    &                   C,R

WRENS, DIPPER                     Occurrence        Chance of Seeing        Habitat

___ Rock Wren                            2                    &                   H
___ Canyon Wren                       2,1                  &                   H
___ Bewick's Wren                                            #
___ House Wren                          2                    *                   A,P,R,U,M     
___ Winter Wren                                               #
___ Dipper                                  1                    &                   W

KINGLETS, GNATCATCHERS            Occurrence        Chance of Seeing        Habitat

___ Golden-crowned Kinglet                       1                    &                   S        
___ Ruby-crowned Kinglet                          2                    *                   S,L,D        
___ Blue-gray Gnatcatcher                                              #

BLUEBIRDS, THRUSHES, THRASHERS    Occurrence        Chance of Seeing        Habitat

___ Eastern Bluebird                                                        #    
___ Western Bluebird                                 2                    ^                   P
___ Mountain Bluebird                                2                    *                   P,G,T
___ Townsend's Solitaire                            1                    &                   C
___ Veery                                                2,4                  #                   R
    (Willow Thrush)
___ Swainson's Thrush                               2                    &                   D,S
    (Olive-backed Thrush)
___ Hermit Thrush                                     2                    &                   D,S
___ American Robin                                  1,2                  *                   E
___ Varied Thrush                                                           #
___ Gray Catbird                                       2                    ^                   R
___ Northern Mockingbird                                                 #
___ Sage Thrasher                                    4,2                  ^                   M,G
___ Brown Thrasher                                                         ^                   R 

PIPITS, WAXWINGS, SHRIKES         Occurrence        Chance of Seeing        Habitat

___ Water Pipit                                          2,4                  *                   T,G
___ Sprague's Pipit                                                           #
___ Bohemian Waxwing                               5                    ^,*
___ Cedar Waxwing                                     5                    ^                                  
___ Northern Shrike                                     3                    &                   G        
___ Loggerhead Shrike                                 4                    ^                   G       

STARLINGS, VIREOS                 Occurrence        Chance of Seeing        Habitat

___ European Starling                           1                    &                   U,R       
___ Solitary Vireo                                 2                    ^                   P,A
___ Warbling Vireo                                2                    *                   A,R
___ Red-eyed Vireo                              4,2                  #                   R,A

WOOD WARBLERS                     Occurrence        Chance of Seeing        Habitat

___ Tennessee Warbler                          4                    #        
___ Orange-crowned Warbler                 4,2                  ^                   R,B        
___ Nashville Warbler                             4                    #
___ Virginia's Warbler                             2                    &                   M
___ Northern Parula                                                     #        
___ Yellow Warbler                                 2                    &                   R,B       
___ Chestnut-sided Warbler                    4,2                  #        
___ Magnolia Warbler                             4,2                  #
___ Black-throated Blue Warbler              4                    #
___ Yellow-rumped Warbler                    2,4                  *                   C,R,A
    (Audubon's Warbler)
    (Myrtle Warbler 4)
___ Black-throated Gray Warbler              4                    #
___ Townsend's Warbler                          4                    ^                   P,R,A
___ Black-throated Green Warbler            4                    #
___ Grace's Warbler                                4                    #              
___ Palm Warbler                                    4                    #        
___ Bay-breasted Warbler                       4,2                  #
___ Black-and-White Warbler                   4                    #                     
___ American Redstart                            4,2                  #                   R
___ Worm-eating Warbler                        4                    #         
___ Ovenbird                                                               #                   R       
___ Northern Waterthrush                                             #                   R
___ Connecticut Warbler                          4                    #
___ MacGillivray's Warbler                       2                    &                   B,R
___ Common Yellowthroat                       4                    #                   B
___ Hooded Warbler                                4                    #                    
___ Wilson's Warbler                               2                    *                   B,R
    (Pileolated Warbler)                                                      
___ Yellow-breasted Chat                        4                    #                   R       

TANAGERS                          Occurrence        Chance of Seeing        Habitat

___ Hepatic Tanager                                              #
___ Scarlet Tanager                         4                    #
___ Western Tanager                       2                    &                   C       

GROSBEAKS, BUNTINGS, SPARROWS     Occurrence        Chance of Seeing        Habitat

___ Rose-breasted Grosbeak             2                    #
___ Black-headed Grosbeak              2                    &                   R,A,P      
___ Lazuli Bunting                            2                    ^                   R,M       
___ Green-tailed Towhee                  2                    &                   M
___ Rufous-sided Towhee                 2,3                  ^                   M       
___ American Tree Sparrow              3                    &                   M        
___ Chipping Sparrow                       2                    *                   P,G       
___ Clay-colored Sparrow                 4                    #                   G,T
___ Brewer's Sparrow                      2,4                  ^                   G
___ Vesper Sparrow                         2,4                  &                   G,T            
___ Lark Sparrow                             2,4                  #                   G
___ Sage Sparrow                            4,2                  #                   M
___ Lark Bunting                               4                    ^                   G,T       
___ Savannah Sparrow                     2,4                  ^                   G,T
___ Fox Sparrow                               2                    #                   R         
___ Song Sparrow                            2,1                  &                   B,R       
___ Lincoln's Sparrow                        2                    *                   B        
___ White-throated Sparrow               3                    #        
___ White-crowned Sparrow               2                    *                   B,K
    (Gambel's subspecies)                     
___ Harris' Sparrow                           3                    #        
___ Dark-eyed Junco                        1,3                  *                   E,C
    (Gray-headed Junco)
    (Subspecies: Oregon)                    3                    *                   E
     Slatecolored                                 3                    &                   E
     Whitewinged                                 3                    ^                   E

BLACKBIRDS, MEADOWLARKS, ORIOLES  Occurrence        Chance of Seeing        Habitat

___ Bobolink                                                             #       
___ Red-winged Blackbird                    2,3                  &                   B,G,W        
___ Western Meadowlark                      2                    ^                   G
___ Yellow-headed Blackbird                 4                    #       
___ Rusty Blackbird                                                    #        
___ Brewer's Blackbird                         2,4                  &                   B,G,T,W        
___ Common Grackle                           2                    ^                   U,G       
___ Brown-headed Cowbird                   2                    &                   C,G,R,U
___ Northern Oriole                              2,4                  #                   R
    (Bullock's Oriole)                     

FRINGILLID FINCHES                Occurrence        Chance of Seeing        Habitat

___ Rosy Finch                                  1                    &                   T,G
    (Brown-capped Rosy Finch)
    (Subspecies Hepburn's Gray-          3,4                ^,&,#
    crownedand Black)                     
___ Pine Grosbeak                             1                    &                   S
___ Cassin's Finch                              1                    &                   M,P,S
___ House Finch                                 1                    &                   U        
___ Red Crossbill                               1,5                  &                   C,F
___ White-winged Crossbill                  5                    #                   C
___ Common Redpoll                          3                    ^                             
___ Pine Siskin                                  1,2                 &,*                  C,E,F
___ Lesser Goldfinch                           2                    #                   R             
___ American Goldfinch                      2,3                  ^                   R       
___ Evening Grosbeak                       3,2,5                &                   A,C,R,U        

OLD WORLD SPARROWS                Occurrence        Chance of Seeing        Habitat

___ House Sparrow                             1                    &                   U
    (English Sparrow)
 
For more information contact Richard G. Beidleman, Colorado College in cooperation with the National Park Service cover by Howard Rollin.
 
This resource is based on the following source:
Beidleman, R.G. in cooperation with the National Park Service.  No date. 
     Checklist of birds of Rocky Mountain National Park and Arapaho
     National Recreation Area.  National Park Service.  Unpaginated. 
     Jamestown, ND: Northern Prairie Wildlife Research Center Home Page.
     http://www.npwrc.usgs.gov/resource/othrdata/chekbird/r6/rockymt.htm 
     (Version 22MAY98).