Small Tortoiseshell (Aglais urticae)

Upperside. Sexes appear similar.
Upperside. Sexes appear similar.

Young larvae feeding communally.
Young larvae feeding communally.
Older larvae nearing pupation.
Older larvae nearing pupation.
Pupae bred-through at home. These had been parasitized by <i>Sturmia bella</i>.
Pupae bred-through at home. These had been parasitized by Sturmia bella.
<i>Sturmia bella</i> the newly arrived parasitoid fly that affects this species.
Sturmia bella the newly arrived parasitoid fly that affects this species.
 
Information

NERC Act S41: Not listed
Local status: Common and widespread though numbers vary wildly from year to year for unexplained reasons. A parasitoid fly Sturmia bella has recently established itself in Britain and may affect the species.
Size: Medium.
Larval foodplant: Common Nettle
No. of broods: Usually two.
Flight time(s): May be seen in mild spells during winter, but finally emerges from hibernation in March and flies until the end of May. The first of the new broods begins to emerge in mid June and both broods fly back-to-back until late September, when they go into hibernation.
Winter: Hibernates as an adult, often in sheds, garages, churches etc.
Habits:
Habitats: Anywhere that nectar and Nettles occur.
Distribution:

Normalized Weekly Abundance


Flight time graph


No. of Adults

Number of adults
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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)