The Ivy Plasterer bee (Colletes hederae)
I featured this bee last year (with video) but as it's one of my favourite bees, I couldn't resist doing so again.
As soon as the Ivy flowers, this bee appears as if by magic, in large numbers.
I love watching them go to work.

''Colletes hederae'', the ivy bee, is a species of plasterer bee belonging to the family Colletidae subfamily Colletinae.
Similar species: Wasps, Bees, Sawflies And Ants
By Philip Booker
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Uploaded Sep 28, 2021. Captured Sep 25, 2021 17:04 in 65 Crespin Way, Brighton BN1 7FL, UK.
comments (4)
The two photos are, I believe both female.
They emerge late September, weeks after the males, who will then pounce on them en masse in a frenzied attempt to mate in what's called a 'mating ball'.
I think last year's photo is a worn out female who's been through that experience, while the one above looks freshly emerged? Posted 3 years ago
Posted 3 years ago