29 July 2014

Clouded Yellow (Colias croceus) - Dhahran Hills

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.