Does a butterfly have a heart?

[PhilM]

Yes, in fact they have several. Scientists at Harvard have discovered a small pumping organ on each wing of a moth or butterfly. They pump haemolymph through tiny capillaries beneath the insect's wing scales. The moth or butterfly is able to regulate the temperature of its wings this way. Although true pumps, they are very weak. Harvard has named them Wing-Hearts. Fascinating.

Best wishes,
Phil.