Andrenidae

These small bees are 6-8 mm long, mostly metallic black, but some are brown or reddish brown. The head and thorax are usually covered with dense setae. They have solitary or colonial habits, and large groups may occur together to utilize a favorable habitat. Individual females construct their own entrance burrows and cells in the ground, but there may be some common-use entry burrows. The below-ground brood cells are provisioned with nectar and pollen for developing larvae. Both sexes remain in the nest through late summer and winter and emerge in the spring.

Andrena vicina Adults are 11-13 mm long, and the body is black to brownish black; there are yellow markings on the face. This species is commonly found visiting flowers of apple, wild cherry, and many other trees. Adults are active from April to October. Large numbers may establish nests in turfgrass and patches of bare soil. They damage or disruptnormal growth of turfgrass, and their presence is a health threat to some people and pets and a nuisance to others. Large colonies may occur year after year in the same location, especially if the nest site remains. This species is distributed in North America.

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