Last fall, in the frigid, snowy forests of the Russian Far East, three wild tiger cubs lost their most important ally: their mother. Our story began on Nov. 29 with a phone call to the Wildlife Conservation Society (WCS) office in Vladivostok from Vladimir Vasiliev, the head of the regional wildlife department, Okhotnazor. He requested our assistance in capturing the four-month-old cubs, which had created a stir near a small village by attempting to make a meal out of a farmer’s dog.

We responded immediately by deploying WCS conservationists (and brothers) Kolya and Sasha Rybin, two of the best tiger trackers in the world. The WCS team met up with rangers from the Russian agency, Inspection Tiger, the local inspector from Okhotnazor, and staff from the Severtsov Institute of Ecology and Evolution before heading out to find the cubs.