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2. Large Yellow Underwing, Broad-
Yellow Underwings -
A number of British moths have a yellow or orange hindwing, bordered with black. Of these 7 are in the genus Noctua, of which the 5 shown are the most common.
Large yellow underwing
Centre of kidney mark is usually black, particularly towards trailing edge of the forewing.
Black pip-
Broad-
Often has black pip-
Cross-
Oval and kidney marks are large and rounded.
Lesser Broad-
Markings and colouring on the Lesser Broad-
Surface of the forewings has a sheen so that areas appear white.
A large triangle on the leading edge of the wing and near the apex is red.
1. Lesser Yellow Underwing and Least Yellow Underwing
When at rest Least Yellow Underwing and Lesser Yellow Underwing could easily be mistaken
for other Noctuids such as the Uncertain Moth (Hoplodrina octogenaria)
Lesser yellow underwing often has similar colour and markings to Large yellow underwing but it does not have the black ‘pip marks’ near the apex of the fore wing.
Also Lesser yellow underwing (wing length about 18mm) is smaller than Large Yellow Underwing (wing length about 24mm).
The Lunar Yellow Underwing is the size of Lesser Yellow Underwing and does have the ‘pip marks’ but it is Nationally Scarce (See Hantsmoths).
A thin collar behind the head is green but gradually fades.
If you are unsure of a Noctuid moth’s identity it is well worth checking the hindwing.
1. Lesser Yellow Underwing, Least Yellow Underwing
2. Large Yellow Underwing, Broad-
Lesser Broad-
Lesser Yellow Underwing
Larger than many other Noctuids, such as Uncertain, as its
wing length is about 18mm or more.
Size also distinguishes it from Least Yellow Underwing,
with a wing length of about 15mm
Larger than many other Noctuids
Least Yellow Underwing
A similar size to many other Noctuids, such as Uncertain.
Both have a wing length of about 15mm and similar forewing markings (see Rustics
page)
This group can often be distinguished from other Noctuids by their shape -
However
Both Lesser Yellow Underwing and
Least Yellow Underwing have two crosslines just below
the kidney mark, the inner one made up of broken arcs and the outer one of dots.
The oval and kidney marks are suffuse
Unlike Least Yellow Underwing, Lesser Yellow Underwing has :-
1.Clearly defined oval
and kidney marks
2. A clear row of triangular dots along the outer edge of the wing.