The liver of polar bears contains large amounts of Vitamin A and is toxic. It’ll take weeks to kill you, though.
And the reason it is called a Pitohui bird - it is that is the sound made when spitting out the awful tasting skin. … p’tooohey
Quick note on Dart Frogs . . .
Only those caught in the wild would be harmful to a person. The captive-raised ones are harmless. I’ve been looking into getting some for some time now, so I made sure to research that little tidbit, heh. Given that in captivity, they tend to be fed dlightless fruitflies and small crickets, they’re not going to get the poison in their diet to secrete from their skin.
But in the wild . . . One tiny drop of toxin is all it takes to paralyze and in some cases kill a foe—including a person. Doing a little research, it seems the Phyllobates have batrachotoxin and Dendrobates have pumiliotoxin, which is less toxic. The Dendrobates are what you usually see in captivity.
Anyway, by the sounds of it, just licking a Phyllobates could do a pretty nasty number on you, heh. Eating an ENTIRE one? Oomph.