An image of two rarely seen bush dogs taken on April 14, 2008 is perhaps the "most exciting" of all the camera-trap photos recovered so far as part of the National Zoo's Peruvian Amazon Biodiversity Project, Kolowski said.
Almost nothing is known about this species, which is rarely seen even by indigenous people who live and hunt in the rain forest.
"It's fascinating how elusive these guys can be," Kolowski said, adding that it's unusual for a large dog species to go unstudied for so long.
What scientists do know is that the animals are social, Kolowski said. In both camera-trap photos that have been taken so far during the project, bush dogs appeared in pairs.
Photograph courtesy Peruvian Amazon Biodiversity Project