MaryandBob's picture

Unknown larvae

Observed: 18th June 2013 By: MaryandBobMaryandBob’s reputation in InvertebratesMaryandBob’s reputation in Invertebrates

We found this strange thing on a Birch (we think) leaf, when we pulled it off, the little caterpillar fell out! If anyone could tell us what it is, that would be great, thanks!

Species interactions

No interactions present.

Species with which Coleophora interacts


Richard Dickson's picture

Coleophora case on birch

The case is consistent with the common species C.serratella, whose foodplants are birch and elm, though occasionally it is found on others. The caterpillar makes a hole in the skin of the leaf and eats out the tissue between the upper and lower skins, making small roundish 'windows' that have a hole where the caterpillar entered. It makes many such holes in its life.

Richard Dickson