摘要：Chapin (1963) discussed in some detail the supposed ‘grey mutants’ of the African Paradise-flycatcher Terpsiphone viridis occurring in southwestern Uganda, eastern DR Congo and the coastal region of Gabon, from where several paradise-flycatchers with black, crested heads, and with bodies, wings and tail wholly or almost whol- ly dark-bluish-grey had been collected. Such birds were originally treated as either ‘melanistic mutants’ or as a grey-backed colour phase of Terpsiphone viridis.
