«They would likely have fed on small vertebrates and fruits.» (newscientist.com)
Spiders, caterpillars and earthworms are also taken, as well as small vertebrates such as small mammals, small birds, reptiles and frogs. (owlpages.com)
Rather infrequently, they have also been witnessed eating small vertebrates such as frogs, lizards, salamanders or snakes. (sciencedaily.com)