Check out Revell Model Makers' none too subtle stress on part of the word "endangered", because they know how to sell to boys.
Endangered AND dangerous! This mid-70s back-of-comics ad shows a gorilla, komodo dragon, condor and rhino. It's probably a good thing dodos were already extinct because they'd have been hard-pressed to make those look fearsome. But where are the giant otters, siberian tigers and goliath frog? They deserve snap-on models too!