Passage: The brown tree snake preys upon birds, lizards, bats, and rats and other small rodents in its native range.  It preys on birds and shrews in Guam.Due to the availability of prey and lack of predators in introduced habitats such as Guam, they have been known to grow to larger sizes than their normal 1 to 2 m (3.3 to 6.6 ft) in length. The longest recorded length of this species is one found on Guam measuring 3 m (9.8 ft).

Question: What does the brown tree prey on?
birds, lizards, bats, and rats and other small rodents