Snow Leopards: Love At Second Sight?
Early this year we received a new snow leopard male, Beauregard, with the hopes of introducing him to our female, Anna (see post A New Snow Leopard Beau). The couple and updates on the pair’s status have been the hot topic on Big Cat Trail at the San Diego Zoo. Initially, we tried an introduction just prior to breeding season. Neither cat took much of a liking to the other, which was not surprising. In the wild, these cats live highly solitary lives and only come together for short periods during breeding season.
Shortly thereafter, Anna started showing signs of entering estrous. This time her mood made an expected 180-degree turn as she immediately approached Beau with friendly chuffing and flirtatious behavior. Strangely, Beau was not receptive, and he either ignored her advances or aggressively repelled them. Anna became increasingly frustrated with Beau’s behavior. Eventually, as Anna’s cycle passed, she became less interested in Beau, and we halted introductions.
Fortunately, snow leopards have more than one chance to breed per season, and three weeks later Anna started showing interest in Beau again. We re-introduced the pair, and Anna tried to solicit attention from Beau again, and again Beau was either indifferent or aggressive toward her. We started to lose hope that this couple just might not be compatible. Yet Anna was not as easily dissuaded. On this go around, she got more and more insistent with her advances toward Beau. Finally something clicked, and we observed several days of successful breeding. Anna’s persistence had paid off! Even after the end of their breeding cycle, we were able to keep the pair together. A bond seemed to have formed, and they would even greet each other with mutual grooming first thing in the morning.
Breeding season is now waning, and the pair is separated again. Now all we can do is keep our fingers crossed and monitor Anna’s behavior for possible indications of pregnancy. Researchers at the San Diego Zoo Institute for Conservation Research are also monitoring her hormones for pregnancy by analyzing her feces (imagine buying that at-home test at your local drug store!). Since neither cat has reproduced before, the possibility of them passing on their genes to ensure a more diverse and healthy future population of these rare, elusive, and endangered animals is very exciting.
Todd Speis is a senior keeper at the San Diego Zoo. Read his previous post, Habitat for Hyenas.










