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Trend Analysis Form
Disabled archived version!
This part of the Home Page allows you to select a species,
a region, and a starting and ending year, and the Home Page
will conduct an analysis for
that species, region, and period. This is experimental, so exercise caution
in reviewing the results.
Analysis methods
Most of you realize that analysis of BBS data can be controversial.
The survey covers such a large area that regional differences in number
and quality of survey routes are inevitable. Also, the count data
collected in the survey are only indexes to the population, and the
proportion of animals counted can differ among routes and observers.
For more information on these issues, visit our
description of the BBS .
Consequently, there are many notions of how to analyze the data,
and some of the differences in methods can provide quite different
results. We provide 2 alternative procedures for analysis, a
linear route-regression approach based on estimating equations ,
and a LOESS-based route-regression
approach . We have compared the results of these analyses on the
large (survey-wide) scale, and found that they provide generally similar
results. If you want to see a summary of the comparison, and our opinions
on which analysis to use,
click here .
Occasionally, if a route is omitted from the
regional analysis, a message will be printed. These can be ignored.
Please enter the species name:
(Tip: to find a species name, click in the selection box, then type the first letter
of the name. It will find the next occurrence of that letter)
Common Loon [Gavia immer ]
Pied-billed Grebe [Podilymbus podiceps ]
Horned Grebe [Podiceps auritus ]
Red-necked Grebe [Podiceps grisegena ]
Eared Grebe [Podiceps nigricollis ]
American White Pelican [Pelecanus erythrorhynchos ]
Brown Pelican [Pelecanus occidentalis ]
Double-crest. Cormorant [Phalacrocorax auritus ]
Pelagic Cormorant [Phalacrocorax pelagicus ]
Anhinga [Anhinga anhinga ]
American Bittern [Botaurus lentiginosus ]
Least Bittern [Ixobrychus exilis ]
Great Blue Heron [Ardea herodias ]
Great Egret [Ardea alba ]
Snowy Egret [Egretta thula ]
Little Blue Heron [Egretta caerulea ]
Tricolored Heron [Egretta tricolor ]
Cattle Egret [Bubulcus ibis ]
Green Heron [Butorides virescens ]
Black-crn. Night Heron [Nycticorax nycticorax ]
Yellow-crn. Night Heron [Nyctanassa violacea ]
White Ibis [Eudocimus albus ]
Glossy Ibis [Plegadis falcinellus ]
White-faced Ibis [Plegadis chihi ]
Roseate Spoonbill [Ajaia ajaja ]
Wood Stork [Mycteria americana ]
Black Vulture [Coragyps atratus ]
Turkey Vulture [Cathartes aura ]
Black-bell. Whist. Duck [Dendrocygna autumnalis ]
Fulvous Whistling-Duck [Dendrocygna bicolor ]
Canada Goose [Branta canadensis ]
Mute Swan [Cygnus olor ]
Wood Duck [Aix sponsa ]
Gadwall [Anas strepera ]
American Wigeon [Anas americana ]
American Black Duck [Anas rubripes ]
Mallard [Anas platyrhynchos ]
Mottled Duck [Anas fulvigula ]
Blue-winged Teal [Anas discors ]
Cinnamon Teal [Anas cyanoptera ]
Northern Shoveler [Anas clypeata ]
Northern Pintail [Anas acuta ]
Green-winged Teal [Anas crecca ]
Canvasback [Aythya valisineria ]
Redhead [Aythya americana ]
Ring-necked Duck [Aythya collaris ]
Lesser Scaup [Aythya affinis ]
Bufflehead [Bucephala albeola ]
Common Goldeneye [Bucephala clangula ]
Barrow's Goldeneye [Bucephala islandica ]
Hooded Merganser [Lophodytes cucullatus ]
Common Merganser [Mergus merganser ]
Red-breasted Merganser [Mergus serrator ]
Ruddy Duck [Oxyura jamaicensis ]
Osprey [Pandion haliaetus ]
Swallow-tailed Kite [Elanoides forficatus ]
White-tailed Kite [Elanus leucurus ]
Mississippi Kite [Ictinia mississippiensis ]
Bald Eagle [Haliaeetus leucocephalus ]
Northern Harrier [Circus cyaneus ]
Sharp-shinned Hawk [Accipiter striatus ]
Cooper's Hawk [Accipiter cooperii ]
Northern Goshawk [Accipiter gentilis ]
Harris's Hawk [Parabuteo unicinctus ]
Red-shouldered Hawk [Buteo lineatus ]
Broad-winged Hawk [Buteo platypterus ]
Swainson's Hawk [Buteo swainsoni ]
Red-tailed Hawk [Buteo jamaicensis ]
Ferruginous Hawk [Buteo regalis ]
Golden Eagle [Aquila chrysaetos ]
Crested Caracara [Caracara plancus ]
American Kestrel [Falco sparverius ]
Merlin [Falco columbarius ]
Peregrine Falcon [Falco peregrinus ]
Prairie Falcon [Falco mexicanus ]
Chukar [Alectoris chukar ]
Gray Partridge [Perdix perdix ]
Ring-necked Pheasant [Phasianus colchicus ]
Ruffed Grouse [Bonasa umbellus ]
Sage Grouse [Centrocercus urophasianus ]
Blue Grouse [Dendragapus obscurus ]
Sharp-tailed Grouse [Tympanuchus phasianellus ]
Greater Prairie-Chicken [Tympanuchus cupido ]
Wild Turkey [Meleagris gallopavo ]
Mountain Quail [Oreortyx pictus ]
Scaled Quail [Callipepla squamata ]
California Quail [Callipepla californica ]
Gambel's Quail [Callipepla gambelii ]
Northern Bobwhite [Colinus virginianus ]
Clapper Rail [Rallus longirostris ]
King Rail [Rallus elegans ]
Virginia Rail [Rallus limicola ]
Sora [Porzana carolina ]
Purple Gallinule [Porphyrula martinica ]
Common Moorhen [Gallinula chloropus ]
American Coot [Fulica americana ]
Sandhill Crane [Grus canadensis ]
Killdeer [Charadrius vociferus ]
Mountain Plover [Charadrius montanus ]
Black-necked Stilt [Himantopus mexicanus ]
American Avocet [Recurvirostra americana ]
Greater Yellowlegs [Tringa melanoleuca ]
Lesser Yellowlegs [Tringa flavipes ]
Solitary Sandpiper [Tringa solitaria ]
Willet [Catoptrophorus semipalmatus ]
Spotted Sandpiper [Actitis macularia ]
Upland Sandpiper [Bartramia longicauda ]
Long-billed Curlew [Numenius americanus ]
Marbled Godwit [Limosa fedoa ]
Common Snipe [Gallinago gallinago ]
American Woodcock [Scolopax minor ]
Wilson's Phalarope [Phalaropus tricolor ]
Laughing Gull [Larus atricilla ]
Franklin's Gull [Larus pipixcan ]
Ring-billed Gull [Larus delawarensis ]
California Gull [Larus californicus ]
Herring Gull [Larus argentatus ]
Western Gull [Larus occidentalis ]
Glaucous-winged Gull [Larus glaucescens ]
Great Black-backed Gull [Larus marinus ]
Gull-billed Tern [Sterna nilotica ]
Caspian Tern [Sterna caspia ]
Royal Tern [Sterna maxima ]
Common Tern [Sterna hirundo ]
Forster's Tern [Sterna forsteri ]
Least Tern [Sterna antillarum ]
Black Tern [Chlidonias niger ]
Black Skimmer [Rynchops niger ]
Rock Dove [Columba livia ]
Band-tailed Pigeon [Columba fasciata ]
White-winged Dove [Zenaida asiatica ]
Mourning Dove [Zenaida macroura ]
Inca Dove [Columbina inca ]
Common Ground-Dove [Columbina passerina ]
Black-billed Cuckoo [Coccyzus erythropthalmus ]
Yellow-billed Cuckoo [Coccyzus americanus ]
Greater Roadrunner [Geococcyx californianus ]
Groove-billed Ani [Crotophaga sulcirostris ]
Barn Owl [Tyto alba ]
Western Screech-Owl [Otus kennicottii ]
Eastern Screech-Owl [Otus asio ]
Great Horned Owl [Bubo virginianus ]
Northern Pygmy-Owl [Glaucidium gnoma ]
Burrowing Owl [Athene cunicularia ]
Barred Owl [Strix varia ]
Short-eared Owl [Asio flammeus ]
Lesser Nighthawk [Chordeiles acutipennis ]
Common Nighthawk [Chordeiles minor ]
Common Poorwill [Phalaenoptilus nuttallii ]
Chuck-will's-widow [Caprimulgus carolinensis ]
Whip-poor-will [Caprimulgus vociferus ]
Black Swift [Cypseloides niger ]
Chimney Swift [Chaetura pelagica ]
Vaux's Swift [Chaetura vauxi ]
White-throated Swift [Aeronautes saxatalis ]
Ruby-thr. Hummingbird [Archilochus colubris ]
Black-chin. Hummingbird [Archilochus alexandri ]
Anna's Hummingbird [Calypte anna ]
Costa's Hummingbird [Calypte costae ]
Calliope Hummingbird [Stellula calliope ]
Broad-tail. Hummingbird [Selasphorus platycercus ]
Rufous Hummingbird [Selasphorus rufus ]
Allen's Hummingbird [Selasphorus sasin ]
Belted Kingfisher [Ceryle alcyon ]
Lewis's Woodpecker [Melanerpes lewis ]
Red-headed Woodpecker [Melanerpes erythrocephalus ]
Acorn Woodpecker [Melanerpes formicivorus ]
Gila Woodpecker [Melanerpes uropygialis ]
Golden-fronted Woodpecke[Melanerpes aurifrons ]
Red-bellied Woodpecker [Melanerpes carolinus ]
Williamson's Sapsucker [Sphyrapicus thyroideus ]
Yellow-bell. Sapsucker [Sphyrapicus varius ]
Red-naped Sapsucker [Sphyrapicus nuchalis ]
Red-breasted Sapsucker [Sphyrapicus ruber ]
Ladder-back. Woodpecker [Picoides scalaris ]
Nuttall's Woodpecker [Picoides nuttallii ]
Downy Woodpecker [Picoides pubescens ]
Hairy Woodpecker [Picoides villosus ]
Red-cockaded Woodpecker [Picoides borealis ]
White-headed Woodpecker [Picoides albolarvatus ]
Three-toed Woodpecker [Picoides tridactylus ]
Black-backed Woodpecker [Picoides arcticus ]
Yellow-shafted Flicker [Colaptes auratus auratus ]
Red-shafted Flicker [Colaptes auratus cafer ]
Gilded Flicker [Colaptes chrysoides ]
Unknown flicker [Colaptes species ]
Pileated Woodpecker [Dryocopus pileatus ]
Olive-sided Flycatcher [Contopus cooperi ]
Western Wood-Pewee [Contopus sordidulus ]
Eastern Wood-Pewee [Contopus virens ]
Yellow-bell. Flycatcher [Empidonax flaviventris ]
Acadian Flycatcher [Empidonax virescens ]
Willow/Alder Fly. [Empidonax spp. (2 species) ]
Least Flycatcher [Empidonax minimus ]
Hammond's Flycatcher [Empidonax hammondii ]
Gray Flycatcher [Empidonax wrightii ]
Dusky Flycatcher [Empidonax oberholseri ]
Pacific-slope Flycatcher[Empidonax difficilis ]
Cordilleran Flycatcher [Empidonax occidentalis ]
Black Phoebe [Sayornis nigricans ]
Eastern Phoebe [Sayornis phoebe ]
Say's Phoebe [Sayornis saya ]
Vermilion Flycatcher [Pyrocephalus rubinus ]
Ash-throated Flycatcher [Myiarchus cinerascens ]
Grt. Crested Flycatcher [Myiarchus crinitus ]
Brown-crest. Flycatcher [Myiarchus tyrannulus ]
Couch's Kingbird [Tyrannus couchii ]
Cassin's Kingbird [Tyrannus vociferans ]
Western Kingbird [Tyrannus verticalis ]
Eastern Kingbird [Tyrannus tyrannus ]
Scissor-tld. Flycatcher [Tyrannus forficatus ]
Loggerhead Shrike [Lanius ludovicianus ]
White-eyed Vireo [Vireo griseus ]
Bell's Vireo [Vireo bellii ]
Gray Vireo [Vireo vicinior ]
Yellow-throated Vireo [Vireo flavifrons ]
Plumbeous Vireo [Vireo plumbeus ]
Cassin's Vireo [Vireo cassinii ]
Blue-headed Vireo [Vireo solitarius ]
Hutton's Vireo [Vireo huttoni ]
Warbling Vireo [Vireo gilvus ]
Philadelphia Vireo [Vireo philadelphicus ]
Red-eyed Vireo [Vireo olivaceus ]
Gray Jay [Perisoreus canadensis ]
Steller's Jay [Cyanocitta stelleri ]
Blue Jay [Cyanocitta cristata ]
Green Jay [Cyanocorax yncas ]
Western Scrub-Jay [Aphelocoma californica ]
Pinyon Jay [Gymnorhinus cyanocephalus ]
Clark's Nutcracker [Nucifraga columbiana ]
Black-billed Magpie [Pica pica ]
Yellow-billed Magpie [Pica nuttalli ]
American Crow [Corvus brachyrhynchos ]
Northwestern Crow [Corvus caurinus ]
Fish Crow [Corvus ossifragus ]
Chihuahuan Raven [Corvus cryptoleucus ]
Common Raven [Corvus corax ]
Horned Lark [Eremophila alpestris ]
Purple Martin [Progne subis ]
Tree Swallow [Tachycineta bicolor ]
Violet-green Swallow [Tachycineta thalassina ]
N. Rough-winged Swallow [Stelgidopteryx serripennis ]
Bank Swallow [Riparia riparia ]
Cliff Swallow [Petrochelidon pyrrhonota ]
Cave Swallow [Petrochelidon fulva ]
Barn Swallow [Hirundo rustica ]
Carolina Chickadee [Poecile carolinensis ]
Black-capped Chickadee [Poecile atricapillus ]
Mountain Chickadee [Poecile gambeli ]
Chestnut-bkd. Chickadee [Poecile rufescens ]
Boreal Chickadee [Poecile hudsonicus ]
Oak Titmouse [Baeolophus inornatus ]
Juniper Titmouse [Baeolophus griseus ]
Tufted Titmouse [Baeolophus bicolor ]
Black-crested Titmouse [Baeolophus bicolor atricristatu]
Verdin [Auriparus flaviceps ]
Bushtit [Psaltriparus minimus ]
Red-breasted Nuthatch [Sitta canadensis ]
White-breasted Nuthatch [Sitta carolinensis ]
Pygmy Nuthatch [Sitta pygmaea ]
Brown-headed Nuthatch [Sitta pusilla ]
Brown Creeper [Certhia americana ]
Cactus Wren [Campylorhynchus brunneicapillus]
Rock Wren [Salpinctes obsoletus ]
Canyon Wren [Catherpes mexicanus ]
Carolina Wren [Thryothorus ludovicianus ]
Bewick's Wren [Thryomanes bewickii ]
House Wren [Troglodytes aedon ]
Winter Wren [Troglodytes troglodytes ]
Sedge Wren [Cistothorus platensis ]
Marsh Wren [Cistothorus palustris ]
American Dipper [Cinclus mexicanus ]
Golden-crowned Kinglet [Regulus satrapa ]
Ruby-crowned Kinglet [Regulus calendula ]
Blue-gray Gnatcatcher [Polioptila caerulea ]
Black-tailed Gnatcatcher[Polioptila melanura ]
Eastern Bluebird [Sialia sialis ]
Western Bluebird [Sialia mexicana ]
Mountain Bluebird [Sialia currucoides ]
Townsend's Solitaire [Myadestes townsendi ]
Veery [Catharus fuscescens ]
Swainson's Thrush [Catharus ustulatus ]
Hermit Thrush [Catharus guttatus ]
Wood Thrush [Hylocichla mustelina ]
American Robin [Turdus migratorius ]
Varied Thrush [Ixoreus naevius ]
Wrentit [Chamaea fasciata ]
Gray Catbird [Dumetella carolinensis ]
Northern Mockingbird [Mimus polyglottos ]
Sage Thrasher [Oreoscoptes montanus ]
Brown Thrasher [Toxostoma rufum ]
Long-billed Thrasher [Toxostoma longirostre ]
Bendire's Thrasher [Toxostoma bendirei ]
Curve-billed Thrasher [Toxostoma curvirostre ]
California Thrasher [Toxostoma redivivum ]
Crissal Thrasher [Toxostoma crissale ]
Le Conte's Thrasher [Toxostoma lecontei ]
European Starling [Sturnus vulgaris ]
Sprague's Pipit [Anthus spragueii ]
Cedar Waxwing [Bombycilla cedrorum ]
Phainopepla [Phainopepla nitens ]
Blue-winged Warbler [Vermivora pinus ]
Golden-winged Warbler [Vermivora chrysoptera ]
Tennessee Warbler [Vermivora peregrina ]
Orange-crowned Warbler [Vermivora celata ]
Nashville Warbler [Vermivora ruficapilla ]
Virginia's Warbler [Vermivora virginiae ]
Lucy's Warbler [Vermivora luciae ]
Northern Parula [Parula americana ]
Yellow Warbler [Dendroica petechia ]
Chestnut-sided Warbler [Dendroica pensylvanica ]
Magnolia Warbler [Dendroica magnolia ]
Cape May Warbler [Dendroica tigrina ]
Black-thr. Blue Warbler [Dendroica caerulescens ]
Myrtle Warbler [Dendroica coronata coronata ]
Audubon's Warbler [Dendroica coronata auduboni ]
Black-thr. Gray Warbler [Dendroica nigrescens ]
Black-th. Green Warbler [Dendroica virens ]
Townsend's Warbler [Dendroica townsendi ]
Hermit Warbler [Dendroica occidentalis ]
Blackburnian Warbler [Dendroica fusca ]
Yellow-throated Warbler [Dendroica dominica ]
Grace's Warbler [Dendroica graciae ]
Pine Warbler [Dendroica pinus ]
Prairie Warbler [Dendroica discolor ]
Palm Warbler [Dendroica palmarum ]
Bay-breasted Warbler [Dendroica castanea ]
Blackpoll Warbler [Dendroica striata ]
Cerulean Warbler [Dendroica cerulea ]
Black-and-white Warbler [Mniotilta varia ]
American Redstart [Setophaga ruticilla ]
Prothonotary Warbler [Protonotaria citrea ]
Worm-eating Warbler [Helmitheros vermivorus ]
Swainson's Warbler [Limnothlypis swainsonii ]
Ovenbird [Seiurus aurocapillus ]
Northern Waterthrush [Seiurus noveboracensis ]
Louisiana Waterthrush [Seiurus motacilla ]
Kentucky Warbler [Oporornis formosus ]
Connecticut Warbler [Oporornis agilis ]
Mourning Warbler [Oporornis philadelphia ]
MacGillivray's Warbler [Oporornis tolmiei ]
Common Yellowthroat [Geothlypis trichas ]
Hooded Warbler [Wilsonia citrina ]
Wilson's Warbler [Wilsonia pusilla ]
Canada Warbler [Wilsonia canadensis ]
Yellow-breasted Chat [Icteria virens ]
Hepatic Tanager [Piranga flava ]
Summer Tanager [Piranga rubra ]
Scarlet Tanager [Piranga olivacea ]
Western Tanager [Piranga ludoviciana ]
Olive Sparrow [Arremonops rufivirgatus ]
Spotted Towhee [Pipilo maculatus ]
Eastern Towhee [Pipilo erythrophthalmus ]
Canyon Towhee [Pipilo fuscus ]
California Towhee [Pipilo crissalis ]
Abert's Towhee [Pipilo aberti ]
Cassin's Sparrow [Aimophila cassinii ]
Bachman's Sparrow [Aimophila aestivalis ]
Rufous-crowned Sparrow [Aimophila ruficeps ]
Chipping Sparrow [Spizella passerina ]
Clay-colored Sparrow [Spizella pallida ]
Brewer's Sparrow [Spizella breweri ]
Field Sparrow [Spizella pusilla ]
Black-chinned Sparrow [Spizella atrogularis ]
Vesper Sparrow [Pooecetes gramineus ]
Lark Sparrow [Chondestes grammacus ]
Black-throated Sparrow [Amphispiza bilineata ]
Sage Sparrow [Amphispiza belli ]
Lark Bunting [Calamospiza melanocorys ]
Savannah Sparrow [Passerculus sandwichensis ]
Grasshopper Sparrow [Ammodramus savannarum ]
Baird's Sparrow [Ammodramus bairdii ]
Henslow's Sparrow [Ammodramus henslowii ]
Le Conte's Sparrow [Ammodramus leconteii ]
Nelson's S.t. Sparrow [Ammodramus nelsoni ]
Seaside Sparrow [Ammodramus maritimus ]
Fox Sparrow [Passerella iliaca ]
Song Sparrow [Melospiza melodia ]
Lincoln's Sparrow [Melospiza lincolnii ]
Swamp Sparrow [Melospiza georgiana ]
White-throated Sparrow [Zonotrichia albicollis ]
White-crowned Sparrow [Zonotrichia leucophrys ]
White-winged Junco [Junco hyemalis aikeni ]
Slate-colored Junco [Junco hyemalis spp. ]
Oregon Junco [Junco hyemalis spp. ]
Gray-headed Junco [Junco hyemalis spp. ]
McCown's Longspur [Calcarius mccownii ]
Chestnut-col. Longspur [Calcarius ornatus ]
Northern Cardinal [Cardinalis cardinalis ]
Pyrrhuloxia [Cardinalis sinuatus ]
Rose-breasted Grosbeak [Pheucticus ludovicianus ]
Black-headed Grosbeak [Pheucticus melanocephalus ]
Blue Grosbeak [Guiraca caerulea ]
Lazuli Bunting [Passerina amoena ]
Indigo Bunting [Passerina cyanea ]
Painted Bunting [Passerina ciris ]
Dickcissel [Spiza americana ]
Bobolink [Dolichonyx oryzivorus ]
Red-winged Blackbird [Agelaius phoeniceus ]
Tricolored Blackbird [Agelaius tricolor ]
Eastern Meadowlark [Sturnella magna ]
Western Meadowlark [Sturnella neglecta ]
Yellow-head. Blackbird [Xanthocephalus xanthocephalus ]
Rusty Blackbird [Euphagus carolinus ]
Brewer's Blackbird [Euphagus cyanocephalus ]
Common Grackle [Quiscalus quiscula ]
Boat-tailed Grackle [Quiscalus major ]
Bronzed Cowbird [Molothrus aeneus ]
Brown-headed Cowbird [Molothrus ater ]
Orchard Oriole [Icterus spurius ]
Hooded Oriole [Icterus cucullatus ]
Baltimore Oriole [Icterus galbula ]
Bullock's Oriole [Icterus bullockii ]
Scott's Oriole [Icterus parisorum ]
Pine Grosbeak [Pinicola enucleator ]
Purple Finch [Carpodacus purpureus ]
Cassin's Finch [Carpodacus cassinii ]
House Finch [Carpodacus mexicanus ]
Red Crossbill [Loxia curvirostra ]
White-winged Crossbill [Loxia leucoptera ]
Pine Siskin [Carduelis pinus ]
Lesser Goldfinch [Carduelis psaltria ]
Lawrence's Goldfinch [Carduelis lawrencei ]
American Goldfinch [Carduelis tristis ]
Evening Grosbeak [Coccothraustes vespertinus ]
House Sparrow [Passer domesticus ]
Eurasian Tree Sparrow [Passer montanus ]
Please enter the region of interest:
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Multi-state[AZ, CO, NM, UT]
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Dove Management: Western States
Dove Management: Western Interior States
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