Page last updated 10th Feb 2021
Genus Abia
[Abia aenea]
Sawfly website; Steven Falk photos
No confirmed Norfolk records. However, closer examination of some recent records of apparent A. lonicerae elsewhere in the UK has revealed several more records of this species, previously known from only a single 1947 Devon specimen. Hence, several recent visual records of apparent A. lonicerae in Norfolk are unsafe as they could conceivably refer to this species. Specimens of this species pair would be very welcome (very difficult from photos).
Abia candens
Sawfly website; Steven Falk photos
Just two county records to date, from Kenninghall Fen in July 1993 and East Walton Common in July 2001.
Abia fasciata
Sawfly website; Steven Falk photos
Relatively widespread species, the larvae feeding on honeysuckle and related plants.
19th century - no records
20th century - King's Lynn area, Wheatfen, Wendling, Reymerston, East Dereham, Swanton Novers, Norwich, Beeston Common
21st century - Felbrigg, Upton Broad, Norwich, East Winch, Bowthorpe, Ken Hill, Foxley, Old Catton, Santon Downham
Abia lonicerae
Sawfly website; Steven Falk photos
No older records but five recent claims, from Beeston Common (Apr 2015), Norwich (Apr 2017, two from April 2019, Apr 2020) and Salthouse Heath (May 2017). All of these are clearly either lonicerae or aenea, but most are not safely identifiable to species from the images provided. Only the 2017 Salthouse and 2020 Norwich individuals appear safe to confirm as Abia lonicerae on current knowledge.
Abia sericea
Sawfly website; Steven Falk photos
Relatively widespread, although care needs to be taken in separating this species from candens.
19th century - specimens taken at Brundall and Dilham
20th century - King's Lynn area, Wheatfen, East Dereham, Scarning Fen, Hoe Common, Buxton Heath, Beeston Common, Foulden Common, Weybourne Heath, Beetley
21st century - Beeston Common, West Runton, Shotesham Common
Genus Cimbex
Cimbex connatus
Sawfly website; Steven Falk photos
A recent colonist, larvae feeding on alder. The first county record was from Great Yarmouth in 2008, followed by others from Whitlingham Country Park in 2012 (larva), How Hill in 2017, Catfield in 2017 and Wheatfen in 2019. Then an explosion of six records in 2020, including as far west as Titchwell.
Cimbex femoratus
Sawfly website; Steven Falk photos
A widespread and striking species, larvae of which feed on birch.
19th century - known from Norfolk by Stephens, but no records as such
20th century - records from King's Lynn area, Wheatfen, Grimes Graves, Mundford, Kelling Heath, Beeston Common and Thursford.
21st century - records from Norwich, Beeston Common, Knapton, Acle, Salthouse Heath, Holme, Thetford Forest nr Weeting, Litcham Common, Waxham Sands, Honing, Mousehold Heath, Whitlingham, Narborough, Buxton
Cimbex luteus
Sawfly website; Steven Falk photos
A willow-feeding species. Many larvae collected at Buckenham Tofts in 1976, and larvae also found at Cranwich Pits in 2013 and 2014, and from Claxton 2020. An adult was recorded from Weybourne in 2019.
Cimbex quadrimaculatus
Sawfly website; Steven Falk photos
No Norfolk records - a single possibly British specimen said to have been collected near Salisbury
No Norfolk records - a single possibly British specimen said to have been collected near Salisbury
The single species, P amerinae, was reported in the 19th century from Windsor, but not subsequently and the records are considered somewhat questionable.
A very difficult genus, with seven currently recognised species on the British list, although authorities differ on this and definitive identification guidance is hard to find. Norfolk records are similarly somewhat uncertain, but there are several named as lucorum plus older records of scalesii and tibiale. The true situation still needs to be unravelled however.
Trichiosoma laterale
Sawfly website; Steven Falk photosNo Norfolk records - it may be a northern/western species in the UK, but identification problems make this hard to ascertain. Larvae said to feed on birch and willow.
Trichiosoma lucorum
Sawfly website; Steven Falk photosRecords (and often specimens) exist from Sparham, King's Lynn area, East Dereham, Holt Lowes, Shipdham, Wendling, Strumpshaw, Horsey and Norwich. However, identification keys are confusing. This species apparently feeds on birch, although at least two Norfolk records were reared from pupae found on hawthorn (so perhaps refer instead to tibiale)
Trichiosoma pusillum
Sawfly websiteNo Norfolk records. Apparently a rare willow-feeding species but status essentially unknown.
Trichiosoma scalesii
Sawfly websiteA single record from King's Lynn area in the early 20th century, but said to have been bred from birch which is perhaps more suggestive of lucorum? This is apparently a willow-feeding species.
Trichiosoma sorbi
Sawfly website; Steven Falk photosNo Norfolk records - a north-western species feeding on Rowan.
Trichiosoma tibiale
Sawfly website; Steven Falk photosBridgman (late 19th century) said this was common on 'whitethorn hedges' (presumably hawthorn, which is the main foodplant) around Norwich. No confirmed records since, although it feels like specimens of lucorum raised from hawthorn from Shipdham (1953) and Wendling (1958) may well prove to be this species.
Trichiosoma vitellina
[Genus Corynis]
Two species (crassicornis and obscura) were reported from Britain in the 19th century but are considered of uncertain status; neither in Norfolk.
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