Food Plant: Betula (Birch)

Egg: Underside of leaf

Mine: June - July, September - October  

Notes: The mine starts from brown spot, later filled with greenish frass. The larva is yellow (appears green in mine - as shown). The mine is difficult to locate initially but becomes brown as it ages.

Data: 03.x.2024, Kirkby Moor, North Lincolnshire, VC54

Image:© Martin Gray