images

Brachylophosaurus

by

Julius T. Csotonyi/Novapix

Reference

t-din03-70000

Date

2010-04-17

In a 77-million-year-old wetland in Montana, the individual of Brachylophosaurus canadensis called "Leonardo" (far right) bellows a call, warning his herd of an ambush by a Daspletosaurus torosus (background, left). A pair of azhdarchid pterosaurs survey the scene aerially while a Basilemys tutle observes from the water in the foreground.