Bats might eat birds, according to Spanish and Swiss researchers:
They said giant noctule bats, large bats with an 18-inch (45-centimetre) wingspan, were eating mostly insects during the spring but appeared to have a diet heavy in bird meat during the autumn.No other animal preys on birds that migrate at night, and this species of bat may have switched to this abundant food source recently, they reported in the Public Library of Science journal PLoS ONE.
“In the course of a few million years, bats colonized most ecological niches and learned to exploit a wide array of food sources including arthropods, pollen, fruit, small terrestrial vertebrates and even blood,” Ana Popa-Lisseanu and Carlos Ibanez of the Consejo Superior de Investigaciones Cientificas in Seville, Spain, and colleagues wrote.