Cowbirds lay their eggs in neighboring nests and abandon the to be raised by surrogate bird parents. Researchers recently spent some attempting to figure out whether the birds know they are different from their adopted families and how they handle it in terms of feeding, mating and flocking.
Inbreeding among Saltmarsh sparrows and Nelson's sparrows is creating a hybrid zone that is difficult for researchers to identify--and threatening the species with extinction.
Anyone who has lived in New York can tell you that city life doesn't exactly make you friendly. In fact, you can grow to be downright suspicious of strangers if you live in the wrong neighborhood. Now, a new study has found that the same is true for birds, with urban sparrows proving far more aggressive and unruly, compared to their rural relatives.
Sparrows, known for their melodic, whistling songs, are shedding light on how humans perceive sound and when this ability arose over the course of human evolution, according to new research.