Swallow Prominent Pheosia tremula - Distribution map

Please note that the NBN Gateway map service has been terminated as of 1 April 2017.

As soon as a replacement map service is available, distribution maps will hopefully appear here again.

In the meantime, you can get some idea of distribution from the NBN Atlas website.

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71.017 BF2007

Swallow Prominent Pheosia tremula

(Clerck, 1759)

Wingspan 45-55 mm.

Similar to Lesser Swallow Prominent, though not necessarily larger, this species has a noticeably longer and narrow white tornal triangular streak than that species. It also differs in having a fine whitish line running through the dark blotch in the tornal region.

It is fairly common throughout Britain, and flies between May and July, with two broods in the south.

The larvae feed on poplar (Populus) and sallow (Salix).
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