Lesser Swallow Prominent Pheosia gnoma
Lesser Swallow Prominent Pheosia gnoma
Adult • Littleborough, Lancashire • © Ian Kimber

71.018 BF2006
Lesser Swallow Prominent Pheosia gnoma

(Fabricius, [1777])

Wingspan 45-50 mm.

A fairly common moth throughout most of Britain, this species is very similar to Swallow Prominent (P. tremula), but can be identified with care. Compared to that species, gnoma has a more distinct white wedge at the tornus of the forewing, and lacks the wavy white line in the blackish area of the hindwing.

Northern forms can show a chocolate brown head and thorax, in contrast to the typically paler-headed forms further south.

There are two generations, on the wing in May and June, and later in August. The larvae feed on birch (Betula).

back to top

ProCache: v317 Render date: 2018-10-13 13:16:05 Page render time: 0.2928s Total w/ProCache: 0.3355s