Small whitethroat

Description

It is distinguished from Hume's and lesser whitethroats by its smaller size (12 cm length,8–13 g weight),smaller bill,the uniformly paler grey head lacking the well-marked dark cheeks of Hume's and lesser whitethroats,and a lighter grey-brown back;in these differences it follows Gloger's rule of pale colour in arid regions.The throat is white,and the rest of the underparts pale greyish-white.