One year ago, Cheyenne Mountain Zoo in Colorado Springs welcomed something it had not seen in nearly 13 years: a baby gorilla. Today that baby - Sully, a western lowland gorilla - turned one, and the zoo threw a public party to mark it [1].

The milestone is sweeter for the family details. Sully is mother Asha's third baby, and the first offspring for Goma, the troop's silverback - a first-time father whose genes matter to a species that cannot spare any [2]. Western lowland gorillas are critically endangered, their wild populations pushed down for decades by poaching, disease, and habitat loss, which is why births like Sully's are coordinated across zoos through a managed breeding program that keeps the insurance population genetically healthy [1][2].

A first birthday sounds small next to numbers like those. It is not: infancy is the fragile stretch, and a critically endangered gorilla reaching one year old, thriving, with keepers like Ashton Asbury's Primate World team watching over the troop, is a year banked for the species [1]. Happy birthday, Sully - here is to many more [1][2].