Przewalski’s horse (aka Asiatic Wild Horse, Mongolian wild horse, tahki, and Dzungarian horse)
A sign by the paddock read:
“PREPARING FOR FUTURE FOALS
A future for the Przewalski’s horse, extinct in nature since the 1970s, relies on reintroducing healthy breeding herds. But the zoo population is getting old, fast! National Zoo scientists have found that many horses are inbred and past their breeding prime.
To get the most out of middle-aged mares and stallions, National Zoo scientists are turning to assisted reproduction techniques — used successfully with domestic horses. Ultrasound exams, hormone analysis, and frozen preservation of sperm help us build a genetically valuable herd, with foals for the future.”