For animals exploring new territory, taking risks is key to survival. But eating unfamiliar foods can be dicey, since they might contain new pathogens and parasites. One avian immune system, however, ...

I doubt any species in this country is more overlooked than the house sparrow. In fact, they are actively despised by many because they are an exotic, invasive species. What’s more, they can bomb your ...

The house sparrow is about 15 centimeters long and weighs about 25–35 grams. It has brown and black striped upperparts and gray undersides. The male has a black throat patch and gray skullcap, while ...

An unassuming little bird, you might not have guessed the house sparrow is an invasive species – introduced to the U.S. from Europe in the 1800s. The male is a chocolate brown with a black mask, and ...