Dahlia, Bumble bees on pink coloured flower growing outdoor.

Dahlia, Bumble bee on pink coloured flower growing outdoor.

Globe Thistle, Echinops, Bee on a globe thistle in the kitchen gardens of Buckland Abbey, Cornwall.

Culver's root, Veronicastrum sibiricum, White-tailed Bumble bee Bombus lucorum, feeding on mauve flowerhead in a garden.

Bergamot, Bee balm, Monarda fistulosa, Garden bumble bee, Bombus hortorum, pollinating a pink flower.

Sea holly, Eryngium zabelii, Bumble bee Bombus terrestris & honey bee Apis mellifera, pollinating flowerhead in garden border.

Tufted vetch, Vicia cracca, Bumble bee Bombus terrestris, pollinating purple flower in grassy area of woodland.

Geranium, Cranesbill, White-tailed Bumble bee Bombus lucorum, pollinating flower in a garden.

Globe thistle, Echinops orientalis, Bumble-bee Bombus terrestris, pollinating flowerhead.

Chive, Allium schoenoprasum, Tree Bumble bee, Bombus hypnorum, pollinating purple coloured flower.

Golden Groundsel, Leopard plant 'Desdemona' Ligularia dentata 'Desdemona', White-tailed Bumble bee, Bombus lucorum, covered in pollen from flowerhead.

Prairie mallow, Sidalcea malviflora, White-tailed Bumble bee, Bombus lucorum, flying to pollinate pink flowers.