Wall Brown (Lasiommata megera)

Male. (Has thick dark band in centre of forewing).
Male. (Has thick dark band in centre of forewing).

NERC Act S41: Species of Principal Importance
Local status: Become very rare. This Bedfordshire species has declined more than any other in recent years, and may now be extinct in this county. It has largely disappeared from inland English counties, but is still present around the coasts, and in northern England.
Size: Medium.
Larval foodplant: A variety of grasses.
No. of broods: Two, sometimes three.
Flight time(s): Early May to mid June. Mid July to mid September. A small third brood is possible in October.
Winter: Larva
Habits: Males patrol, often along a bank, hedge or wall, sometimes one following another, looking for females which are more secretive and less easily found. They are very difficult to approach, perhaps the hardest of all species, and are easily put to flight, but they may settle again if left undisturbed.
Habitats: Unimproved grassland, clay pits, brown-field sites and woodland rides.

Normalized Weekly Abundance

Flight time graph

No. of Adults

Number of adults
No. of 1km Squares

Number of 1km squares
No. of Records

Number of records
No. of Adults per record

Adults per record
Percentage of all adults

Percentage of all adults reported (of all species) in each year
Percentage of all records

Percentage of all butterfly records
No. of adults per 10,000 records

Number of adults in every 10,000 butterfly records (of all species)