Observations on some East African Birds.

Abstract

Summary Contributions are made to the biology of about forty species. Among other items dealt with are parasitism in Cercococcyx ; undeseribed nests and eggs, including those of Pseudoalcippe a. abyssinicus, Phyllastrephus f. placidus, Calamonastes s. simplex, Uræginihus cyanocephalus, Cryptospiza salvadorii , and Emberiza poliopleura ; removal of its own eggs by a Nightjar ( Caprimulgus ); care of young Klaas's Cuckoos by birds of their own species; polygamy and monogamy in the Ploceus spp.; subspecific and local voice‐variation; communal nest‐building in Spermestes nigriceps ; the number of grass‐stems comprising a nest of Pseudonigrita cahanisi.