The authors describe the evolution, morphological characteristics, body weights, body measurements and production performance of three indigenous cattle breeds in Bhutan, namely the Siri, Mithun cross Siri (Jatsha for male and Jatsham for female) and first backcross hybrids (Yangka for male and Yangkum for female). The data was collected through a sample survey which was conducted in Lobesa block of Thimphu district in April/May 1995 near the Natural Resources Training Institute (NRTI). Observations were recorded from 44 Siri (22 bulls and 22 cows), 10 Mithun cross Siri (5 Jatshas and 5 Jatshams) and 8 first backcross hybrids (5 Yangkas and 3 Yangkums). The aim of this breed description is to assist in developing the future conservation strategies of the indigenous breeds in Bhutan.
