Avian Conservation and Ecology - Écologie et conservation des oiseaux: When is an “Extinct” Species Really Extinct? Gauging the Search Efforts for Hawaiian Forest Birds and the Ivory-billed Woodpecker

Fig. 4. The relationship between home-range size and posterior probability of extinction given no valid visual detections and the search efforts at White River (WR) and Bayou de View (BDV). We assume a geometric prior distribution with prior probability of extinction being 0.5. The arrow indicates a home range as large as the surveyed area; this gives the same results as having birds uniformly distributed throughout the region.