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Phyllonorycter ulmifoliella
Red Birch Midget (Hübner, 1817)
Gracillariidae: Lithocolletinae
353 / 15.075
Photo © Raymond A Watson,  Hollesley, Suffolk Gen det

Similar Suffolk Species: None
Wingspan: 7-9mm
Flight: Two Generations. May and Aug.
Foodplant:   Birch.
Nat Status: Common
Verification Grade:  Adult: 4  Mine: A

Morley’s Final Catalogue: Common everywhere on birch. Bentley Woods (Pyett), Aldeburgh (Ctw), Leiston (Grey), Lowestoft 1936 (Gd).

Recent Status: A common species in Suffolk.

Life Style: A double brooded species that has been recorded from April to September. The larvae feed on Betula. They pupate in a tough white cocoon in the larval habitation. The pupal stage passes the winter.

Identification: The moth has a single shining white fascia and a long basal streak. There is a basal dorsal mark that is wide distally. Beyond the fascia there are two dorsal and three costal shining white marks arranged alternately. There is a terminal black mark and line in the cilia. The white marks are broadly dark edged on a variable ground colour of ochreous brown with darker suffusion.
The larvae create a long blister blotch between veins on the underside that significantly distorts the leaf. It has between one and six creases in the lower epidermis and is 8 to 14mm long at maturity. More Info

Determination by Genitalia Examination (gen. det.) Required

Recorded in 37 (64%) of 58 10k Squares.
First Recorded in 1936.
Last Recorded in 2021.

Latest 5 Records
Date#VC10k Area
18/09/2021126TL78 - Brandon/Lakenheath
02/09/2021126TL78 - Brandon/Lakenheath
17/10/2020+26TL77 - Mildenhall
10/10/2020+25TM46 - Minsmere/Leiston
10/10/2020+25TM46 - Minsmere/Leiston
Further info: Phyllonorycter ulmifoliella
 
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