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Osmia californica comes out late in spring, often their emergence overlaps the latter end of the Osmia lignaria (early spring mason bee) season.
However very little is known about them. If you’d like to share your photos of Osmia californica, please email them to me and I will get them on this blog.
|Mason bee se-up while pollinating cherries.
Mason bee nests are made of routered channels cut out of compost board.
Boards are held together with a tie-strap.
|Osmia rufa doing the finishing touches to her nest.|
|Osmia rufa male. Note the long antennae.|
|Females resting over night inside their nesting tunnels.|
|Embrace (Osmia rufa)|
Here is an update from researcher Mike
“We would very much appreciate if you could place a request on your blog. Coastal B.C. would be convenient, but we are willing to consider anything. We do have a colleague collecting stylopized Polistes in Eastern U.S.A.; that is where we found the large Colletes aggregation I referred to in my last email. Please don’t hesitate to contact us if you think of anything.”
This researcher would like assistance with locating a ground nesting colony of Andrena bees. (Stylopized bees are parasitized bees). If you have seen any ground nesting bees, please respond to this web. Your help is greatly appreciated. I think he would like the locations to be in the Vancouver region of BC.
Check out the two links below for beautiful photos of various bee species and stylopized bees.
Hello Dr. Margriet Dogterom,
This year I embarked on an project involving the signalling in Strepsipteran parasites of Polistes wasps. Next spring we would like to expand our research to Andrena bees. Ideally, we need to locate large aggregations to provide a ready supply of stylopized bees. We found one large aggregation that turned out to be Colletes, and another that is not very accessible (It’s on a city boulevard).
Ideally we need to locate colonies before emergence next spring, as the stylopized bees emerge first. Would you happen to know the whereabouts of any Andrena bee aggregations?