Bumblebees vanished overnight

Most of my plants were specifically selected due to their ability to attract pollinators, at the start of the warm weather my garden was full of bumble bees, every day without fail. Their favourite being the 2 large Wall flower plants.

Then overnight they all vanished. over the last 3 days I have seen 1 bumblebee, and he was visiting the bottlebrush tree/bush.

Would there be a reason for them all vanishing over night?

Last year when my garden was in its early stages of just being planted it was full of Hoverflies and Wasps, this year I have seen only a couple of hoverflies and 0 wasps (not that this is a bad thing on the wasp side of things).

I do however have a garden full of ladybirds, ladybird larvae and baby grasshoppers (which makes cutting the grass difficult).

 

The blackberies round here are in full blossom and covered in hundreds/thousands of bumble bees that must have previously been in nearby gardens.

 

My garden was alive with Bees last week but they've disappeared here too,I'm putting it down to the temperature dropping..

 

Just had a lovely warm weekend and was pleasantly surprised at the number of bumble bees buzzing around the garden. Also lots of hoverflies and ladybirds on the nettles.

 

There's lots of bees in my garden at the moment but that may be down to the warmer, sunny weather here.

 

Probably found something better and communicated that to their chums.

 

I agree , found something better

 

Little sods have jumped ship. After all that effort in choosing plants for them lol.

There are a lot of blackberry bushes nearby (about 1/2 mile so I guess they are all over there.