I found this Clouded Yellow Colias crocus in the pivot Irrigation fields at Dhahran on 2 February which was the first one I have seen at the location. At Qaryat Al Ulya Pivot Irrigation fields are the best site for finding the butterflies and I have not seen them in many
places away from here. In the Eastern Province it is abundant in all major
cultivated oases such as Al Hassa, Qatif and Taraut Island. Pivot irrigation
fields are also good areas to find the species such as those where I saw them.
Small isolated populations also exist around Manifa, north of Jubail, on beds
of annual winter legumes growing in the hollows between coastal sand dunes with
the populations supplemented by migrants. They are 45-54 mm in size and most
have an orange-yellow ground with broad black borders to wings. They occurs
mainly from December to early May but at Manifa during February and March. It
has a characteristic to and fro flight over low vegetation.
