House Sparrow Identification, All About Birds, Cornell Lab of Ornithology

You can find House Sparrows most places where there are houses (or other buildings), and few places where there aren’t. Along with two other introduced species, the European Starling and the Rock Pigeon, these are some of our most common birds. Their constant presence outside our doors makes them easy to overlook, and their tendency to displace native birds from nest boxes causes some people to resent them. But House Sparrows, with their capacity to live so intimately with us, are just beneficiaries of our own success.

White-crowned sparrow - Wikipedia

ALL ABOUT BIRDS Regional Field Guides – Cornell Lab Publishing Group

The four most common birds in the world — all live in Minnesota.

WINTER BIRD FEEDING - Cornell Lab of Ornithology

Backyard Birds The Nature Conservancy

All About Birds Northwest

Cornell eBird Explorers: Discover Schoolyard Birds Lessons & Materials Kit, 3-5

House Sparrow Identification, All About Birds, Cornell Lab of Ornithology

All Around Town — Santa Clara Valley Audubon Society

Benicia resident wonders where all the birds have gone

Passer domesticus (house sparrow)