https://en.wikipedia.org/wiki/Mimic_octopus

Or house sparrows, where they'll take over another bird's nesting site by *pecking the brains out of the baby birds* and then building a nest over the corpses. Oh, and they're an invasive species in North America.

Or certain types of feline mimicking the sounds of their prey to lure them in. For a so-called beastmaster, he doesn't know much about animals.

Chameleons don’t actually camouflage themselves, they change colour mostly depending on their mood

Not just outlier cuckoo hatchlings. Fratricide among raptor nestmates is common.

Considering what Rexar saw when he served the Horde in WC1-3. Yeah Animals are above decent.