UKMoths 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.
72.076 BF2451
Clifden Nonpareil Catocala fraxini
(Linnaeus, 1758)
Wingspan 75-95 mm.
This is the Victorian collector's classic all-time favourite, the 'Blue Underwing'. In the British Isles it was formerly resident in certain parts of Kent and Norfolk during the middle part of the 20th century, but it became extinct as a breeding species and for many years was only recorded as an occasional immigrant.
In recent years it has been increasing again and is now considered to be recolonising and once again is a breeding species in some southern counties.
The large greyish caterpillar feeds mainly on aspen (Populus tremulosa).
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