dealbatus การใช้

• And, although uncommonly confused with other cicada species except the nearly identical and closely related " N . tremulus ", this species may be confused for a supercifally similar, but distantly related " Neotibicen " species : " N . dealbatus ".
• It is 18 19 cm in size, and weighs 32-40 grams . It has a blue grey beak with a black tip and a black face mask which extends from the base of the bill to around the eyes . It has ash grey plumage, which is lighter around the breast with darker wings, and silver underwings . It has a black tail with a white tip . There are four different subspecies of back faced wood swallows . These are differentiated by black or white colouration of their tail vents . The white vented subspecies A . c . normani and A . c . dealbatus are found on the Cape York Peninsula and northern Queensland respectively . The black vented A . c . cinereus occurs in south west Australia, while A . c . melanops ccurs in northern Australia and Lesser Sunda Islands including Timor.