The mine of the micromoth Heliozela resplendella is one of the most interesting examples:
|Mine of Heliozela resplendella on Alder|
The miner starts around point C, on the central vein. It then proceeds via a side vein to point B, where it leaves the vein and mines the soft tissue to point A, where it enters another side vein which it mines back towards the central vein at point E. Having reached the central vein, the miner continues to mine it until it reaches point D, at the petiole. It then reverses direction and mines the central vein back to point E, where it enters a side vein. It then makes a very short blotch along that vein before cutting an oval piece of leaf at F. It then descends to the ground, and uses the oval piece of leaf as a pupation wrapper.
This preference for the woody vein material over the soft leaf tissue is a reversal of the usual mining preferences, where soft tissue is eaten, but veins are used for navigation, rather than food.
It should be noted that in some instances of this miner the journey via the soft tissue is omitted: the only externally-visible sign of the mine in those instances is the oval cutout in the leaf.
A single specimen of the July High-flyer came to light:
These can be separated from the Autumn Green Carpet by the round shoulders and the black diagonal slashes at the rear corner of the wings. Can you see the black slashes? Nope, neither can I: they're worn off.