Individual study: Three species of solitary bee Hylaeus sp. use nest boxes with holes of 6 mm diameter or smaller, Iron and Dickinson Counties, Michigan, USA
Scott V.L. (1994) Phenology and trap selection of three species of Hylaeus (Hymenoptera: Colletidae) in Upper Michigan. The Great Lakes Entomologist, 27, 39-47
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Provide artificial nest sites for solitary bees
Scott (1994) placed a total of 9,216 wooden nest boxes with small drilled holes of diameters 4.5-11 mm, on the edges of open fields in Upper Michigan USA, in April 1984 and 1985. Three species of the small solitary bee genus Hylaeus used the boxes, with an overall occupancy rate of 4%. These bees only used holes with the smallest diameters (4.5, 5.2 and 6.0 mm). H. ellipticus preferred the smallest 4.5 mm holes. Hylaeus basalis preferred nest boxes at lower heights 0.1 and 0.4 m above the ground and H. verticalis preferred higher boxes set at 1.1 m.