| Judging by
the recent appearance of Osmia caerulescens in
our garden, this solitary species is not as widespread as
the more common Osmia bicornis (formerly Osmia rufa). More commonly known as the Blue
Mason Bee, Osmia caerulescens females are the
reason behind the common name, but the males
(illustrated) are quite different with a noticeable shiny
metallic gold abdomen. Males are also appreciably smaller
than Osmia bicornis males. The females nest in
holes in walls and trees, often utilising the exit holes
of other invertebrates. |
