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| Videos |
Aerial Roar Video
Marojejy National Park (Camp 2): 2003
Silky sifakas routinely emit high amplitude (loud) broad-band (noisy) roars with open mouths to overhead raptors and other aerial disturbances such as falling trees and small birds. Roars are also emitted spontaneously without apparent cause. Callers do stare skyward, as in this video, while emitting this call, but seldom drop vertically in the trees. Often, all group members will roar together in an antiphonal fashion. This is a remarkably frequent behavior pattern since no raptors or any bird has ever been observed to attempt predation on silky sifakas (this is true of most eastern sifakas). The cat-like fossa is their only documented predator. |
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