"From a preoccupation with how much food is available ... and reproductive potential for these birds. Furthermore, the researchers said tree swallows may be timing breeding to coincide with ...

while birds that flock near livestock, such as blackbirds and starlings, are more likely to transmit pathogens. Farmers may be able to promote insect-eating species like this tree swallow by ...

Unlike mammals, but exactly like birds, large plant-eating dinosaurs tended to swallow their food whole rather than bothering to pre-chew it, according to a team of German researchers. The new ...

But rocks in a stomach don’t automatically signal that an animal used them to crush food. Some birds of prey swallow rocks to clean their digestive tracts. “You have to make a differentiation between ...