aestival उदाहरण वाक्य

There are two seasonal forms, which differ in size and colour : one is a vernal form with adults on wing in spring from April to July, and the other is an aestival form with adults on wing in summer from July to early September.
There are two seasonal forms, which differ in size and colour : one is an aestival form with adults on wing in summer from July to August, and the other is an autumnal form with adults on wing in autumn from mid September to October.