A few nice endangered species of animals images I found:
Portuguese Man-of-War Tentacles
Image by USFWS/Southeast
July 17, 2012 - Blackbeard Island, GA
The tentacles are the second animal in the symbiotic relationship of the Portuguese Man-of-War, which have venom filled stinging cells called nematocysts. Even dead man-of-wars can sting if you come in contact with the tentacles.
Credit: USFWS/Becky Skiba
Queens Zoo drawings
Image by kimwagnerdesigns
Detail of interactive concept for new endangered species area at the Queens Zoo.