Gerrit Vyn / Small flock of adult Canada Geese (Branta canadensis) in flight. Tompkins County, New York, USA, March.

Gerrit Vyn / American woodcock (Scolopax minor) feeding on an earthworm, April, Tompkins County, New York, USA

Gerrit Vyn / Canada Goose (Branta canadensis) brooding a recently hatched chick at the nest. Tompkins County, New York, USA

Gerrit Vyn / Eastern Chipmunk (Tamias striatus) resting on a log, Tompkins County, New York, USA

Gerrit Vyn / Northern / Baltimore oriole (Icterus galbula) male in breeding plumage. Tompkins County, New York, USA May

Gerrit Vyn / Black capped Chickadee (Poecile atricapillus). Tompkins County, New York, USA February

Gerrit Vyn / Blackburnian warbler (Dendroica fusca) male in breeding plumage. Tompkins County, New York, USA May

Gerrit Vyn / Yellow-bellied Sapsucker (Sphyrapicus varius) male on tree trunk, Tompkins County, New York, USA, May.

Gerrit Vyn / Swamp Sparrow (Melospiza georgiana) portrait, perched on branch, Tompkins County, New York, USA, May.

Gerrit Vyn / Red-eyed Vireo (Vireo olivaceus) portrait in profile, perched on branch. Tompkins County, New York, USA, May.

Gerrit Vyn / Prairie Warbler (Dendroica discolor) male singing on branch of tree, with spring leaves, Tompkins County, New York, USA, May.

Gerrit Vyn / Dark-eyed Junco (Junco hyemalis) of the slate-colored form. Perched on branch, Tompkins County, New York, USA, February.

Gerrit Vyn / Black-throated Blue Warber (Dendroica caerulescens) male in breeding plumage, singing. Tompkins County, New York, USA, May.

Gerrit Vyn / Black-capped Chickadee (Poecile atricapillus) clinging to a tree trunk. Tompkins County, New York, USA, February.

Gerrit Vyn / American Goldfinch (Carduelis tristis) male in breeding plumage, perched on branch, Tompkins County, New York, USA. May.

Gerrit Vyn / American Crow (Corvus brachyrhynchos) perched on a branch, with blue sky behind, Tompkins County, New York, USA, December.

Gerrit Vyn / Adult white-striped morph White-throated Sparrow (Zonotrichia albicollis) perched on branch, in breeding plumage. Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Mourning Warbler (Oporornis philadelphia) perched on branch, in breeding plumage. Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Common Yellowthroat (Geothlypis trichas) perched on branch, in breeding plumage. Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Blackburnia Warbler (Dendroica fusca)perched on branch, in breeding plumage. Tompkins County, New York, USA, May.

Gerrit Vyn / Canada Warbler (Cardellina canadensis) male in breeding plumage with a caterpillar prey, Tompkins County, New York, USA, May.

Gerrit Vyn / Male Pine Warbler (Dendroica pinus) perched on branch, in breeding plumage. Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Chestnut-sided Warbler (Dendroica pensylvanica) perched on branch, in breeding plumage. Tompkins County, New York, USA, May.

Gerrit Vyn / Blue-headed / Solitary Vireo (Vireo solitaruis) perched on a branch, Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Black-throated Green Warbler (Dendroica virens) perched on branch, Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Ovenbird (Seiurus aurocapilla) perched on a branch, Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Ovenbird (Seiurus aurocapilla) perched on a branch, singing. Tompkins County, New York, USA, May.

Gerrit Vyn / Gray Catbird (Dumetella carolinensis) perched on a branch, singing in Spring. Tompkins County, New York, USA.

Gerrit Vyn / Adult male Blue-winged Warbler (Vermivora pinus) in breeding plumage, perched in Lichen covered branch. Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Magnolia Warbler (Dendroica magnolia) perched on pine tree, in breeding plumage. Tompkins County, New York, USA, May.

Gerrit Vyn / Singing male Black-throated Green Warbler (Dendroica virens) in breeding plumage, perched on branch. Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Prairie Warbler (Dendroica discolor) in breeding plumage, perched on branch. Tompkins County, New York, USA, May.

Gerrit Vyn / Pair of adult Tree Swallows (Tachycineta bicolor) perched on a nest box. Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male American Robin (Turdus migratorius) perched on a branch, Tompkins County, New York, USA, May.

Gerrit Vyn / Adult Tree Swallow (Tachycineta bicolor) perched on a branch, Tompkins County, New York, USA, May.

Gerrit Vyn / Adult male Common grackle (Quiscalus quiscula) perched in tree, Tompkins County, New York, USA, May.

Gerrit Vyn / Adult Spotted Salamander (Ambystoma maculatum)migrating across a road to a breeding pond on a rainy spring night. Tompkins County, New York, USA, March.

Gerrit Vyn / Adult Ring-billed Gull (Larus delawarensis) in winter plumage. Tompkins County, New York, USA, December.

Gerrit Vyn / Adult female Red-bellied Woodpecker (Melanerpes carolinus). February, Tompkins County, New York, USA

Gerrit Vyn / Adult male Pine Warbler (Dendroica pinus) in breeding plumage. Spring, Tompkins County, New York. USA

Gerrit Vyn / Eastern Screech-Owl (Otus / Megascops asio) in gray morph plumage, roosting in a Pileated Woodpecker (Dryocopus pileatus) excavation hole in a Red Pine tree, Autumn, Tompkins County, New York, USA

Gerrit Vyn / Male Bobolink (Dolichonyx oryzivorus) in breeding plumage. Tompkins County, New Jersey, USA

Gerrit Vyn / Eastern Kingbird (Tyrannus tyrannus) perched on barbed wire, Tompkins County, New York, USA

Gerrit Vyn / Adult Song Sparrow (Melospiza melodia) in Spring on mossy tree trunk. Eastern subspecies M. m. melodia. Tompkins County, New York, USA

Gerrit Vyn / White-throated Sparrow (Zonotrichia albicollis) in white-striped morph breeding plumage. Tompkins County, New York, USA

Gerrit Vyn / Downy Woodpecker (Picoides pubescens) female, foraging on a decaying tree. February, Tompkins County, New York

Gerrit Vyn / Bullfrog (Rana catesbeiana) partially submerged in a pond. August. Tompkins County, New York

Gerrit Vyn / Gray Treefrog (Hyla versicolor) clinging to a tree, August,Tompkins County, New York