A critically endangered Northern white cheeked gibbon (Nomascus leucogenys). Dr. Michael Bomar January 21, 2025 Leave a Comment on A critically endangered Northern white cheeked gibbon (Nomascus leucogenys). Posted in Seen Them Share: XFacebookPinterestLinkedin Featured species: A critically endangered, juvenile Northern white cheeked gibbon (Nomascus leucogenys) at Omaha’s Henry … source Author: Dr. Michael Bomar