Bahrain is a good place to Bird and well worth a visit. It might not be in the class of Kenya or South America but it is small and compact. A hundred species in a day is easy in most seasons except high summer. It has good Hotels, Car hire and numerous eating holes.
Most people speak good English and actually like visitors.
Both visitors and residents alike often ask me which field Guides are the best to cover Bahrain or the central Arabian Gulf. The following I list in my collection and personally recommend Birds of Bahrain. Dr M, Nightingale. Immel Publishing London Birds of Europe with North Africa and the Middle East. Field Guide to the Birds of the Middle East.