Backyard and Beyond

Starting out from Brooklyn, an amateur naturalist explores our world.

As John Burroughs said, “The place to observe nature is where you are.”

Galls and Crane Fly

A two-fer in this shot of a Witch Hazel leaf:This is a boom year for the Witch Hazel Cone Gall-maker (Hormaphis hamamelidis), an aphid. Read more about these tiny insects and how they force the American Witch-Hazel (Hamamelis virginiana) to create these protective cone forms around their young. For more about the endlessly fascinating galls read here.

The insect perched here looks like a Genus Trichocera Winter Crane Fly. There are some 28 species in this genus in the the U.S. and Canada, and as their name suggests they can be found in the winter months, particularly in caves and mines.

One response to “Galls and Crane Fly”

  1. […] is a good gall-tree. One species of aphid, Hormaphis hamamelidis, forces the tree to make cone-shaped galls on the leaves. The young aphid grows up inside this, protected from its enemies. Another species of aphid, the […]

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