White Crabspider on a Purple Flower

This is my favorite spider photograph I have taken.  This is a White Crabspider on a Purple Flower.  I was in Troy Texas visiting family.  I noticed that almost all of the purple flowers had these tiny White Crabspiders on them.  I got my macro lens and started taking photographs.

These tiny arachnids wait on the flowers for other insects to land.  When they land the spiders grab them and eat them.  I don't believe these spiders spin any sort of web.  I never saw any webs around any of the spiders.

These photographs were taken on a Canon 5D Mark II camera using a Sigma 180mm lens and a Canon MT-24EX twin flash unit.  No tripod was used.