Small creature on laurel leaf

Small creature on laurel leaf

Observation - Small creature on laurel leaf. Description: The creature was moving over the surface of the leaf in a manner reminiscent of Platypezid flies but more slowly. I wondered if it was feeding on particulate material not visible to the unaided eye (e.g. fungi) or indulging in some form of display behavi

The creature was moving over the surface of the leaf in a manner reminiscent of Platypezid flies but more slowly. I wondered if it was feeding on particulate material not visible to the unaided eye (e.g. fungi) or indulging in some form of display behaviour (e.g. preliminary to mating).
The larvae of this moth form tunnel mines in bramble leaves and the third image shows a possible example in the site last year (21/09/2011)