Although M. leachella is also a leaf cutter in the subgenus M. (Eutricharaea), it is a European species that is not known to be in Australia. Very few of our bee species occur outside this country and while Megachile (Eutricharaea) rotundata was introduced as a potential pollinator of lucerne it does not appear to have become widely established.
Are they the exotic lawn daisy (Bellis perennis) or native? Could you send me a picture of the whole plant with leaf please. r.farrow@iimetro.com.au Thanks Roger.