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Species · True flies

Black-kneed Fen Fly

Neoascia tenur

2,014Records since 2000
JulyPeak month
78Counties with records

When it is recorded

Jan0
Feb0
Mar1
Apr95
May327
Jun566
Jul662
Aug203
Sep62
Oct9
Nov2
Dec0

GBIF records by month, 2000–2025 (all years combined).

Where it is recorded

#CountyNationRecordsShare
1Norfolk England544
2Cambridgeshire England166
3Isle of Anglesey Wales134
4Worcestershire England68
5Gwynedd Wales62
6Highland Scotland57
7Devon England48
8Ceredigion Wales46
9Powys Wales42
10Swansea Wales42
11Cumbria England35
12Suffolk England30
13Dorset England29
14Stirling Scotland28
15North Yorkshire England27
1,396 England154 Scotland378 Wales14 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 78 counties in all.

About this species

Records since 2000
2,014
Peak month
July
Counties with records
78
Scientific name
Neoascia tenur
Group
True flies
NBN Atlas records since 2000
1,950
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Diptera
Family
Syrphidae
Genus
Neoascia
Name with authority
Neoascia tenur (Harris, 1780)
Described
1780
Contributing datasets
35

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q10797543 · GBIF 1536804