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Thyraylia nana
Birch Straw (Haworth, 1811)
Tortricidae: Tortricinae
968 / 49.133
Photo © Antony Wren,  Dunwich, Suffolk

Similar Suffolk Species
Sheep's-bit Straw
Brevicornutia pallidana
Wingspan: 9-12mm
Flight: May-June
Foodplant:   Downy Birch, Silver Birch
Nat Status: Common
Verification Grade:  Adult: 2

Morley’s Final Catalogue: Local on birch at Tuddenham and Brandon (Wrn); Mildenhall and Darsham in May 1935, and at light by Fritton Lake in May 1937 (Mly).

Recent Status: Common in the Sandlings.

Life Style: A single brooded species with a partial second brood. Flies at night and comes to light during May June and August. The larvae feed on Betula species catkins. They hibernate fully fed in a cocoon on the tree in which they pupate.

Identification: A small Cochylis species marked with grey and some light brown.. The palps and head are pale. The thorax and wing base are marked with grey. There is a grey central band, marked with black that is very wide on the dorsum and narrows somewhat towards the costa. There is a grey suffusion short of the apex. More Info

Recorded in 15 (26%) of 58 10k Squares.
First Recorded in 1935.
Last Recorded in 2023.

Latest 5 Records
Date#VC10k Area
08/07/2023125TM25 - Wickham Market/Otley
25/06/2023125TM24 - Woodbridge/Martlesham
09/06/2023125TM25 - Wickham Market/Otley
09/06/2023125TM49 - Somerleyton/Beccles
16/06/2022126TL77 - Mildenhall
Further info: Thyraylia nana
 
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