Hooded Crow
Corvus cornix (Linnaeus, 1758)
HC
HOOCR
15673
Family: Passeriformes > Corvidae
The two tone corvid, the Hooded Crow or 'hoodie' was classified by the British Ornithologists' Union as a distinct species in 2002.
The Hooded Crow is found in the north and north-west of the UK, where it is far more numerous than Carrion Crow. Where ranges of the two overlap, the crows can hybridise and produce offspring resembling a dark, less contrasting Hooded Crow.
This resident species breeds relatively early, from March laying up to six eggs are laid in large twiggy nests lined with wool and/or hair, typically located in trees, crags or pylons. The population trend for the UK is stable, although this is underpinned by recent declines in the Scotland and increases in Northern Ireland.
Exploring the trends for Hooded Crow
Our Trends Explorer will also give you the latest insight into how the UK's Hooded Crow population is changing.
trends explorerIdentification
Hooded Crow identification is usually straightforward.
SONGS AND CALLS
Listen to example recordings of the main vocalisations of Hooded Crow, provided by xeno-canto contributors.
Young call
Flight call
Call
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Browse training coursesStatus and Trends
Population size and trends and patterns of distribution based on BTO surveys and atlases with data collected by BTO volunteers.
POPULATION CHANGE
The BOU Records Committee took the decision in 2002 to treat Hooded Crow and Carrion Crow as separate species (Parkin et al. 2003). This split is not recognised in BirdLife International's conservation listings. In the UK, Hooded Crows occur in Northern Ireland, the Isle of Man, and in Scotland, mainly west and north of the Great Glen. Retrospective analysis of BBS trends is simple because observers have always recorded Hooded Crows (coded HC) separately from Carrion Crows and from intermediates (coded HB). Intermediate forms between Carrion and Hooded, which predominate in a band across western Scotland and occur less frequently elsewhere in the UK, are not included in either species' BBS index. BBS data suggest that moderate decrease in Hooded Crows has occurred in Scotland, but that this has been countered by a steep increase in Northern Ireland. Hooded Crows had increased markedly in Ireland since 1924 (Hutchinson 1989). The 2007-11 Atlas records little change in the distribution of Hooded Crows but show further incursion of Carrion Crows into northwest Scotland and eastern Ireland (Balmer et al. 2013). There has been an increase among Hooded and Carrion Crows, taken together, across Europe since 1980 (PECBMS: PECBMS 2020a>).
UK breeding population | No population change in UK (1995–2022) |
Exploring the trends for Hooded Crow
Our Trends Explorer will also give you the latest insight into how the UK's Hooded Crow population is changing.
trends explorerDISTRIBUTION
Hooded Crows replaces Carrion Crows in Ireland and most of north and west Scotland. In the eastern part of their Scottish range, Hooded Crows overlap with the Carrion Crows and hybrids are common in a narrow hybrid zone which had been shifting north and west as Carrion Crows gained ground in the lowlands.
Occupied 10-km squares in UK
No. occupied in breeding season | 841 |
% occupied in breeding season | 28 |
No. occupied in winter | 936 |
% occupied in winter | 31 |
European Distribution Map
European Breeding Bird Atlas 2
Breeding Season Habitats
Most frequent in | Bog |
Relative frequency by habitat
Relative occurrence in different habitat types during the breeding season.
DISTRIBUTION CHANGE
Change in occupied 10-km squares in the UK
% change in range in breeding season (1968–72 to 2008–11) | -0.4% |
% change in range in winter (1981–84 to 2007–11) | --10.5% |
SEASONALITY
Hooded Crow is recorded throughout the year.
Movement
Information about movement and migration based on online bird portals (e.g. BirdTrack), Ringing schemes and tracking studies.
RINGING RECOVERIES
View a summary of recoveries in the Online Ringing Report.
Foreign locations of birds ringed or recovered in Britain & Ireland
Biology
Lifecycle and body size information about Hooded Crow, including statistics on nesting, eggs and lifespan based on BTO ringing and nest recording data.
PRODUCTIVITY & NESTING
Number of Broods | 1 |
Egg Size | 43×30 mm Weight = 19.8 g (of which 6% is shell) |
Exploring the trends for Hooded Crow
Our Trends Explorer will also give you the latest insight into how the UK's Hooded Crow population is changing.
trends explorerSURVIVAL & LONGEVITY
View number ringed each year in the Online Ringing Report
Maximum Age from Ringing | 10 years 0 months 5 days (set in 2017) |
Exploring the trends for Hooded Crow
Our Trends Explorer will also give you the latest insight into how the UK's Hooded Crow population is changing.
trends explorerCODES & CLASSIFICATION
Ring size | F |
Field Codes | 2-letter: HC | 5-letter code: HOOCR | Euring: 15673 |
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Research
Interpretation and scientific publications about Hooded Crow from BTO scientists.
CAUSES AND SOLUTIONS
Causes of change
There is little good evidence available regarding the drivers of the breeding population change in this species in the UK.
Further information on causes of change
No further information is available.
Information about conservation actions
Numbers are stable or increasing, hence the Hooded Crow is not a species of concern and no conservation actions are currently required.
As is the case with Carrion Crow, Hooded Crows have been blamed for the declines of other species such as songbirds and waders, leading to calls to control numbers, and legal control of crows still occurs on shooting estates.
Links to more studies from ConservationEvidence.com
- Effects of set-aside management on birds breeding in lowland Ireland
- Rush cutting to create nesting patches for lapwings Vanellus vanellus and other waders, Lower Lough Erne RSPB reserve, County Fermanagh, Northern Ireland
- Managing predation on ground-nesting birds: the effectiveness of nest exclosures
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