Lime leaf aphid

It drips a sticky sweet liquid called honeydew, so the ground and cars under lime trees on the street get sticky.

A black mould likes to grow on that honeydew on the leaves.

The babies have short mouth needles, so they can only drink from the thin veins of a leaf. The grown-ups can reach the thick ones.

There get to be more and more of them all summer long.

Ladybirds and many kinds of tiny wasps hunt them.