The diet of the grey hypocolius consists primarily of fruits, particularly berries and dates, although during the non-breeding season it will also eat other fruits and young shoot leaves. On occasion the grey hypocolius will also consume invertebrates, which are plucked from foliage or snatched from the air in flight. It feeds in small social groups within dense foliage, either on the ground or from a perch (2).
The nest of the grey hypocolius is a cup-shaped structure made from small twigs and lined with grass, down and sometimes hair or wool. The nest is usually situated one to four metres off the ground in a thorny tree. Three to five eggs are typically laid between May and July, and are incubated for 14 days. Both the male and female incubate the eggs as well as feed the chicks (2).
The grey hypocolius leaves its breeding range in September, migrating a short distance south overnight, no further than 1,000 kilometres, where it remains until April. However, some adults have been recorded remaining in West Iran year-round (3).