SUMMARY
Karyotypes of Dicrurus adsimilis, Dicrurus caerulescens, Anthus novaesselandiae rufulus and Dendrocitta vagabunda vagabunda belonging to three different families of order Passeriformes have been studied. The 2n ranged in these 4 species from 68 ± to 90 ± and Z- and W-chromosomes were identified in all except in Anthus novaesselandiae rufulus The karyotypes of D. adsimilis, D. caerulescens and D. v. vagabunda show a general resemblance whereas of A. n. rufulus has a different karyotype. Karyotypic relationship among confamilial and interfamilial species have been discussed.