If only the loss of so many songbirds could be so easily explained.

There were twice as many songbirds in the eastern United States in 1948 as now.

In many songbirds, testosterone mediates mating investment, suggesting that signals should be linked to testosterone production.

There were so many songbirds singing in the branches that it was impossible to pick out a particular voice.

The Audubon Society has urged people to keep cats indoors because the felines kill and eat "many , many songbirds".