The position of the present genus is somewhat uncertain owing to want of information regarding the plumage of the nestling. Mr. W. D. Cumming, who brought up some young birds at Fao from the nest, unfortunately omits to state whether they resemble the adults or not, and I have been unable to examine any but apparently adult birds myself. These, however, are all in the same plumage, sex for sex, and therefore it seems probable that the young are neither spotted, streaked, nor barred, otherwise some traces of these marks would be retained by some of the birds I have examined.
Sharpe speaks of the summer and winter plumage of this bird, but I have not been able to discover that the plumage varies according to season.
Hypocolius is said to be migratory, but I think this statement requires confirmation. It is true that it makes its appearance on the shores of the Persian Gulf about the 10th of April, but it must be remembered that Blanford procured the bird in Sind on the 6th March. It probably moves about the country without being actually a migrant in the ordinary sense of the term.
In Hypocolius the bill is stout and broad at the base and about half the Length of the head; the nostrils are small exposed ovals ; the rictal bristles are weak, but always clearly visible. The wing is short but pointed, the first primary being minute and the second reaching to the tip of the wing. The tail is long and slightly graduated. The tarsus is very short and stout, coarsely scutellated, and shorter than the middle toe and claw.