sparrow

(Newser) - If an animal species lives in an area where it's surrounded by predators, you wouldn't expect to see robust population growth. But what if the animals just think they're surrounded by predators? Turns out, the same applies, according to a new study out of Canada's Western...

(Newser) - Sparrows who live in the big city have learned to speak up in order to be heard: Researchers examined the songs of those that live around the Golden Gate Bridge and found that the calls are in a higher pitch now than they were in 1965, according to an Animal ...