A Green Lynx Spider (Peucetia viridans) on a Rain Lily (Cooperia pedunculata).
Green Lynx Spiders feed primarily insects attracted to flowers, such as bees, wasps, butterflies, true bugs, etc. Rain lilies pop up and bloom two or three days after good rains in the spring and early summer.
Early in the year when the Prickly Pear Cacti are flowering I often find them hiding there. Later, when the cacti flowers die off they migrate to other flowers like this one.
Sigma 70-300mm f/4-5.6 DG APO Macro mounted on a Canon Xti.