Bright Red Pollen??

[Adam Bee]

The ladies are bringing in large amounts of bright red pollen. Any idea what it’s from? I can’t find any flowers producing it locally, but I have no experience in identifying plant pollen...

 

[linoleum bonypart]

Horse chestnut

 

[masterBK]

Close up of Horsechestnut floret showing brick red pollen

 

[masterBK]

After pollination flower stops producing nectar and flower changes from yellow to red. Bees soon learn to ignore the red ones (although they see the reflected UV rather than the red) and concentrate only on the yellow ones

 

[Adam Bee]

Thanks! Great explanation!