A critically endangered Northern white-cheeked gibbon (Nomascus leucogenys). Dr. Michael Bomar January 8, 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