Willow Redgall Sawfly - Euura proxima

Alternative names
Pontania proxima

Adult Willow Redgall Sawflies are small - approximately 3.5-5 mm long. They are shiny, black and wasp-like.

They cause a gall to form on narrow-leaved willows Salix alba and Salix x fragilis and this gall is more likely to be seen than the adult sawfly. The gall is bean-shaped, starting off green but gradually turning red. It is smooth with a thick wall and protrudes from both the upper and lower leaf surface.

Similar Species

Galls of Euura bridgmanii and E. triandrae are all very similar - but are found on sallow and almond willow respectively

Identification difficulty

Gall  Adult

Recording advice

If a gall, it is essential to say which tree species it was on.


Wherever White Willow or Crack Willow grow, usually damp open wooded areas, sometimes hedgerows.

When to see it

Adult May to August

Life History

The larvae of the Willow Redgall Sawfly are pale green in colour with a dark head. They are small and caterpillar-like, reaching only 5 mm in length. Adults emerge in late spring, and females seek out suitable willows on which to lay eggs. The female inserts an egg into leaf tissue where it hatches and begins to eat the soft leaf tissue. This stimulates the leaf to produce a gall which is bean-shaped, smooth and emerges equally on both sides of the leaf. The gall may be green, red or yellow. A single larva feeds in the cavity of each gall.

UK Status

Common and widespread in Britain

VC55 Status

Common in Leicestershire and Rutland.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

Species group:
Records on NatureSpot:
First record:
28/05/2009 (Calow, Graham)
Last record:
15/10/2023 (Graves, Hazel)

Total records by month

% of records within its species group

10km squares with records

The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.

In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.

Latest images

Latest records