El Yunque National Forest, a forest in Puerto Rico (formerly, Caribbean National Forest)
The species is found in lower-elevation forests in the Luquillo Mountains (El Yunque), Cayey Mountain Range and Central Mountain Range.
Because an unexplained major decline in the abundance of this species has occurred in the last two decades, even in relatively undisturbed forests (such as El Yunque), this animal is rarely seen, but an easily accessible forest location sustains an E. locustus population.
The forest is commonly known as El Yunque, which may be attributed to either a Spanish approximation of the aboriginal Taíno word yu-ke which means "white lands", or the word "anvil," which is yunque in Spanish.