Artificial ‘misting system’ allows vanished toad to be released back into the wild

by Jeremy Hance

In 1996 scientists discovered a new species of dwarf toad: the Kihansi spray toad (Nectophrynoides asperginis). Although surviving on only two hectares near the Kihansi Gorge in Tanzania, the toads proved populous: around 17,000 individuals crowded the smallest known habitat of any vertebrate, living happily off the moist micro-habitat created by spray from adjacent waterfalls. Eight years later and the Kihansi spray toad was gone.

Disease combined with the construction of a hydroelectric dam ended the toads’ limited, but fecund, reign. However, before the toad population collapsed completely conservationists with the Wildlife Conservation Society’s (WCS) Bronx Zoo were able to establish a captive population of 499 frogs. Now, researchers are releasing a seed population of Kihansi spray toads back into their native habitat, but with one caveat: an artificial “misting system” is the only thing standing between the tiny amphibians and a second extinction.

“As long as the hydroelectric dam persists, the misting system will be needed in order to provide sufficient ‘spray meadow’ habitat at the base of Kihansi Falls for the single Kihansi Spray Toad population to persist,” Don Church the President and Director of Wildlands Conservation with Global Wildlife Conservation told mongabay.com…

(read more: MongaBay

(photos: T - Rhett Butler; B - Global Wildlife Conservation)