Abstract: The karyotypes of 17 species of birds belonging to Timallinae were studied from bone marrow cells with colchicine-hypotonic air-drying technique,The results were given as follows.Quantitative methods have been employed for comparing the karyotypes of the related species with in a familial group.Tentative conclusion have been drawn regarding intra-and interfamilial chromosomal relationships.Macrochromosome pericentic inversion and deficiency of microchromosomes are found to play a significant role in karyotype evolution in this family.