Eurasian Marsh-Harrier

Circus aeruginosus

183,040Records since 2000

MayPeak month

116Counties with records

Least ConcernIUCN Red List

When it is recorded

Jan18,043

Feb12,903

Mar14,386

Apr20,016

May21,345

Jun13,844

Jul11,883

Aug13,462

Sep14,247

Oct16,469

Nov13,146

Dec12,665

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

#	County	Nation	Records
1	Cambridgeshire	England	29,720
2	Norfolk	England	27,060
3	Suffolk	England	18,694
4	Kent	England	13,540
5	Somerset	England	7,368
6	Lincolnshire	England	6,638
7	East Riding of Yorkshire	England	6,529
8	Essex	England	6,519
9	Dorset	England	4,450
10	Oxfordshire	England	3,157
11	Doncaster	England	2,524
12	Thurrock	England	2,479
13	Rutland	England	2,452
14	Rotherham	England	1,952
15	Leeds	England	1,802

179,080 England1,690 Scotland2,177 Wales67 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 116 counties in all.

Records since 2000: 183,040
Peak month: May
Counties with records: 116
IUCN Red List: Least Concern
Scientific name: Circus aeruginosus
Also known as: Marsh Harrier
Group: Birds
NBN Atlas records since 2000: 23,431
Most recorded in: Cambridgeshire, Norfolk, Suffolk, Kent, Somerset, Lincolnshire, East Riding of Yorkshire, Essex, Dorset, Oxfordshire, Doncaster, Thurrock +40
Conservation designations: Birds Directive, Convention on Migratory Species, Wildlife and Countryside Act 1981, Wildlife (NI) Order 1985, EU wildlife trade (CITES) annexes, Birds of Conservation Concern, GB Red List (2001 IUCN criteria), Scottish Biodiversity List
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Accipitriformes
Family: Accipitridae
Genus: Circus
Name with authority: Circus aeruginosus (Linnaeus, 1758)
Described: 1758
Contributing datasets: 23