Jelaskan Daftar spesies dari Kerak basi

Del Hoyo, J.; Elliot, A. & Christie D. (editors). (2006). Handbook of the Birds of the World. Volume 11: Old World Flycatchers to Old World Warblers. Lynx Edicions. ISBN 84-96553-06-X.

Grimmett, Inskipp and Inskipp, Birds of India ISBN 0-691-04910-6

King, Woodcock and Dickinson,Birds of South-East Asia, ISBN 0-00-219206-3

Mullarney, Svensson, Zetterstrom and Grant, Collins Bird Guide ISBN 0-00-219728-6

Sinclair, I.; Hockey, P. & Tarboton, W. SASOL Birds of Southern Africa (Struik 2002) ISBN 1-86872-721-1