Check List of the Birds of France, Germany, Belgium and Holland.
Check List of the Birds of Colorado.
Soundtrack for 50 Common Birds Songs:
American Crow
American Goldfinch
American Kestrel
American Robin,
Baltimore Oriole,
Barn Swallow,
Barrel Owl,
Belted Kingfisher,
Black-Capped Chicadee,
Blue Jay,
Brown-Headed Cowbird,
Canada Goose,
Cedar Waxwing ,
Chipping Sparrow ,
Common Yellowthroat,
Dark-eyed Junko,
Downy Woodpecker,
Eastern Meadowlark,
Eastern Bluebird,
Eastern Songbird,
Eastern Towhee,
Evening Grosbeak,
Great Blue Heron,
Great Horned Owl,
House Finch,
House Wren,
Indigo Bunting,
Killdeer,
Mallard,
Marsh Wren,
Mourning Dove,
Northern Cardinal,
Northern Flicker,
Northern Mockingbird,
Pileated Woodpecker,
Red-Eyed Vireo,
Red-Tailed Hawk,
Red-Winged Blackbird,
Rose-Breasted Grosbeak,
Ruby-Troated Humminbird,
Ruffed Goose,
Scarlet Tanager,
Song Sparrow,
Tree Swallow,
White-Breasted Nuthatch,
Wild Turkey,
Wood Duck,Wood Thrush,
Yellow-rumped Warbler,
Yellow Warbler