Cloudless sulphur

Description:

The male butterfly is clear yellow above and yellow or mottled with reddish brown below and the female is lemon-yellow to golden or white on both surfaces, with varying amounts of black spotting along the margin and a black open square or star on the bottom forewing.

Habitat:

Mason Farm Biological Reserve

Notes:

I hope the ID is correct. This butterfly was hanging onto this stem and not moving much, which seemed odd to me as they usually flutter away if you come near. So I wondered if it was injured or nearing death.