Key Characteristics: A small gray-and-brown bird, the house sparrow is accustomed to humans, and the birds often hang around houses and buildings. Habitat Range: House sparrows are found in the ...

The day-old bird, smaller than a pinky finger, had brown fuzz all over its body. When Falk and Taylor walked closer to the nest, the chick began twitching and shaking its head—a behavior they had ...