The reproductive isolation among sympatric Pedicularis species is influenced by the differences of pollinator behavior and floral form via ethological isolation and mechanical isolation.
Addie said the bumble bee and the yellow bumble bee when they're not under the microscope look pretty much the same except one's bigger than the other.
When we think about pollination, we may have honeybees in mind, but bumblebees and hoverflies and wasps and moths and butterflies and beetles also pollinate.
This technique lets bees get at the nectar of flowers whose shapes have evolved to encourage their pollination by insects with long tongues, which can reach down narrow tubes.
About 250 species of bumblebees live across the globe. They're most common in temperate regions. But some can be found in the tropics and even in the Arctic.
Nectar robbery, in which a bumblebee carves a hole in the side of a flower as a bank robber might cut his way into a vault, was discovered by Charles Darwin.