On the wing this species is most likely to be confused with species of Pyrausta, although the black hindwing of the Small Yellow Underwing is traversed by a broad yellow band. 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. A clear row of triangular dots along the outer edge of the wing. Individual records comprise of: [1204 Adult] . The wingspan is 31–36 mm. The striped caterpillar that is crawling along the surface of fresh snow is the larval stage of a noctuid or owlet moth known as the Large Yellow Underwing (Noctua pronuba).Noctuids are dull-colored, medium-sized, nocturnal moths that are attracted to lights in the summer. Species; Additional images; Click here to support NatureSpot by making a donation - small or large - your gift is very much appreciated. Least Yellow Underwing (Noctua interjecta) - The Moths of Suffolk. ID: The contrasting pale green of the collar (patagia) which is 'continued' onto the base of the costa is a good feature for recognising this species and the extremely similar N.janthe (Lesser Broad-bordered Yellow Underwing). Thank you. Description. Taxonomy Details; Rank: species Authority: BirdGuides IUCN Category: Not Evaluated BOU Category: British & Irish Rarity Status: Ungraded. 73.346 Least Yellow Underwing Noctua interjecta. First recorded in 1969. Comparison of 1, 2, 5, 6. broad-bordered yellow underwing (Noctua fimbriata) 3. lesser broad-bordered yellow underwing (Noctua janthe) 4. least yellow underwing (Noctua interjecta. Noctua comes is noticeably smaller than pronuba and so is named the lesser yellow underwing; its out-stretched wings measure 1.5 inches from tip to tip. Least Yellow Underwing Least Yellow Underwing - Noctua interjecta. Technical description and variation. The oval and kidney marks are suffuse . Wingspan 31-36 mm. Often rests with its hindwings exposed. Noctuidae : Noctua interjecta - mothdissection.co.uk This website presents images of British and European Lepidoptera preparations. Least Yellow Underwing Noctua interjecta. Unlike Least Yellow Underwing, Lesser Yellow Underwing has :- 1.Clearly defined oval and kidney marks 2. Large Yellow Underwing Larvae Crawling On Snow. Unusually high numbers of adults were trapped at West Bexington on 1 August 1995, as shown in the graphic of all Least Yellow Underwing moths trapped across the county during that year. There are 584 county records of 1204 individuals from 85 different sites. … The length of the forewings is 14–17 mm. Butterflies and Moths Lesser yellow Underwing Ask about this Print. Flies actively in sunshine visiting flowers such as dandelion and buttercup. Lunar Yellow Underwing Noctua orbona (Hufnagal, 1766) Larva: August-June. 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