search the Beediverse Blog


Osmia lignaria

Hi,  I put out a box of 7mm tubes next to my normal 8mm  tubes for the Orchard Mason Bees or Osmia lignaria. The  mason bees are doing very well filling their tubes. Attached is a picture of the 7mm tubes, they have 5-7 bees working in them. Most are horned Face (Osmia cornifrons) but a couple look like the regular Osmia lignaria but are much smaller as can be seen in the picture. My question is are they just small Osmia lignaria that prefer the smaller tubes or is there another species that I don’t know about? From what I can tell they look like the Osmia lignaria but are about the size of a Horned Faced. Thanks                  Norm

 Hello Norm, Thank you for this fine photograph.  I see two bees quite clearly, and the third is a bit too blurry to see what it is.    I do not have any experience with the horned Face mason bee, but it has brownish coloration as the lower bee (see link below).  The black one is  Osmia lignaria.   Both are early spring pollinators, and so both would be about  in early spring.  The size of female mason bees or Osmia lignaria varies quite a bit.  I do not know if this is genetic variation or the end result of varying levels of nutrition.  It is unlikely that there is a third species of a smaller size in early spring.  However, many more smaller black mason bees are around that come out late spring through to  late fall.  at what time of year was this picture taken?    Dr Margriet Dogterom

 

 

  

 

 

 

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Popular Posts

More mason bee tray harvesting pictures from Frank

More mason bee tray harvesting pictures from Frank

January 24th, 2014

Thanks Frank for the great pictures.  This will help a lot of folks when they open up their nesting [...]

What Mason bees are these?

What Mason bees are these?

December 10th, 2013

Hi,  I put out a box of 7mm tubes next to my normal 8mm  tubes for the Orchard Mason Bees or O[...]

Stop parasitic wasps by using a net bag

Stop parasitic wasps by using a net bag

December 10th, 2013

From summer to early winter place mason bee homes inside a net bag.  This will prevent your mason be[...]

No thumbnail available

December- what to do

December 10th, 2013

1.  With snow falling all around us, it is a good time to clean any nesting trays which have benn em[...]

Nesting with abundance- Frank

Nesting with abundance- Frank

January 23rd, 2014

"Hi Margriet .. I'm a little late in sending you my usual "annual report" on the cocoon harvesting b[...]