Big-headed Mining Bee, Andrena bucephala and Red Mason Bee, Osmia bicornis in my garden yesterday.

 A very early flowering blackberry cultivar attracts many insects now including this big-headed solitary bee.  It looks like a Big-headed Mining Bee.

 Above looks like a male Red Mason Bee, Osmia bicornis whilst below, collecting pollen is clearly a female Red Mason Bee.  Males don't do any such work to provision a nest.

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And for my talk The extraordinary lives of wild bees and the important role of gardeners in their survival. click here