Notes on the breeding behavior of a Philippine Eagle pair at Mount Sinaka, Central Mindanao

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We documented the breeding behavior and diet of a Philippine Eagle (Pithecophaga jefferyi) pair from July 1999 to January 2000 in an isolated forest in Central Mindanao. We observed eight distinct courtship displays and several activity patterns on the nest. Copulation started two months prior to egg laying and continued until the first month of incubation, with a mean of 1. 5 copulations per day. Seventy-four percent of the time devoted to incubation was by the female. The incubation period lasted 58 days. Throughout the incubation and early brooding phases the male provided food for the female and the young. Diet consisted of 17 prey items of four vertebrate taxa, mostly mammals, with civet cats (Family Viverridae) and flying lemur (Cynocephalus volans) representing the bulk of the diet.

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