I am masters student who is carrying out a study on how effective Bee Banks and Artifical Bee Boxes are for the conservation of solitary bees in Sandwell Valley. So far I have put up 7 Bee boxes around an RSPB site , all of which have been colonised by leaf cutters. I have seen Megachile Willughbiella , Megachile Versicolor and possibly Megachile Centucularis provisioning leaf cuttings into different holes. Overall , I have seen atleast 54 holes with clear evidence of occupation across all 7 boxes, does anyone know how many eggs/ grubs one leaf cutter provisions in one hole? Does the number of eggs laid differ with each sub species and with changing enviromental conditions?
I would greatly appreicate anyones knoweldge on this subject as it will allow me to estimate population sizes within the boxes