There is no real difference between looking at PHOTOS of LIVE animals and looking at PHOTOS of dinosaurs and other extinct animals!
If you have not actually seen it in real life, it is a matter of TRUSTING SOMEONE'S WORD that it actually exists now.
And, photographic animation and manipulation has been perfected to the point that it is hard to tell what's real and what is not.
So, an "endangered species" of plant, animal, or other protected phenomena, (cave painting, etc) CAN be an entirely hoaxed imagining of someone with an agenda it would support..
Panda bears are real, but some things may not be.
It pays to have a slight skeptical streak.