Whilst birding the Al Namas area in July I came across Arabian Babblers in nearby areas with different bill colours. In the field guide to the region it says these are different races with the yellow-billed birds the Yemen race. HBW, however, does not mention bill colour as a distinguishing feature between the races. This species is very social and always goes around in small groups often calling loudly to each other. They are very active and not so easy to photograph as they have many pairs of eyes looking for danger and move off if they notice anyone.