Based in Philadelphia, Molt's obsession with exotic climates and wildlife led him to search the world for exotic reptiles in the 1960s and sell them from his newly acquired Pennsylvania pet store. Molt is considered a crucial figure in the growth of reptile houses in American zoos, which at the time were a rare attraction. He prepared and distributed a price list of rare reptiles--including snakes, turtles, lizards--and sold them to a wide variety of eager customers and competitive zoos. Molt often carried them into the country in suitcases, easily circumventing the relatively lax customs regulations. When the Endangered Species Act came into effect in 1973, Molt's smuggling business boomed--declaring a reptile species as "endangered" also meant it was rarer and more valuable, allowing Molt to fetch a higher price.

Sea lampreys--invasive, leechlike creatures that once nearly destroyed the Great Lakes' fishing economy--are kept in check by a small U.S.-Canadian program. Will it survive Trump's slash-and-burn campaign? Ally Porter walked ahead of me as we sidestepped down a steep, loamy embankment. Our path lit only by headlamps, a waning sliver of moon, and what seemed to be thousands of stars, we made our way to a mucky riverbank about twenty feet below. At one point, I lost my footing and ended up wedged against a tree trunk. Porter, who had two tight braids that landed just below her shoulders, kept going. She moved with ease through several inches of sludge, toward a yellow glow stick tied to a tree at the water's edge.

A specialized drone could be instrumental in saving an endangered species of ferret in the United States. The U.S. Fish and Wildlife Service has announced plans to test out a program that would use unmanned aerial systems (UAS) to shoot vaccine-covered candy into the black-footed ferret's habitat in Montana. The goal of this scheme is to help inoculate the animal against sylvatic plague -- a disease that can decimate black-footed ferret populations. The vaccination effort is designed to indirectly benefit the ferrets by specifically targeting prairie dog populations, which are also susceptible to the plague. Black-footed ferrets depend on prairie dogs for food and shelter.