Information on the African rainforest elephant, whose survival is threatened, is trickling in now via satellite, thanks to a new technology. Wildlife biologists of the New York Zoological Society have put collars that emit ultra-high-frequency signals on a forest elephant in Korup National Park, Cameroon, and on a savannah elephant in Garamba National Park, Zaire.

Most of the signals from the savannah elephant have been picked up by a weather satellite, but only about one-third signals from the forest elephant received. After decoding the signals, the satellite relays the information to the Bronx Zoo in New York.