A BBC Scotland news website caputred images in a garden in Nairn showing the bees visiting tree leaves covered with aphids. The secretions made by the Aphids offer a substitute for nectar, but they don't contain the protein necessary for the insects to stay healthy.
Dr Ben Darvill, a BCT director and research ecologist said:
It's hard to say for sure, but it does seem as if this behaviour is becoming more common.
Bumblebees are known to feed from aphid secretions, and from extra-floral nectaries on unlikely plants like bracken - but it's more usual to see it in upland areas where there are few other flowers around.
The fact that it is now frequently observed elsewhere may suggest that there are fewer of the right sorts of flowers around in people's gardens and in the wider countryside.
Does this show that we need to manage our environment better? Surely we need to ensure that there are sufficient flowers about to encourage a diverse spread of bees throughout the UK. Turning gardens over to concrete and decking is not the way.