Species Profile
Cuckoo
Cuculus canorus
Cuckoo
Quick Facts
Conservation
LCLeast ConcernLifespan
6–8 years
Length
32–34 cm
Weight
110–130 g
Wingspan
55–60 cm
Migration
Long-distance Migrant
Also known as: Common Cuckoo, European Cuckoo
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Appearance
The Common Cuckoo is a medium-sized bird with a slender body and long, pointed wings. Adults have blue-grey upperparts, white underparts with dark barring, and a distinctive long, graduated tail. The head features a slightly curved, dark grey bill and striking yellow eyes ringed with yellow.
Juveniles differ from adults, showing rufous-brown upperparts with dark barring. Both sexes look similar, though females may have a slight rufous tinge to the neck and breast.
Identification & Characteristics
Colors
- Primary
- Grey
- Secondary
- Brown
- Beak
- Grey
- Legs
- Yellow
Attributes
Understanding Attributes
Rated 0–100 based on research and observation. A score of 50 is average across all bird species. These attributes are relative and don't necessarily indicate superiority.
Habitat & Distribution
Common Cuckoos inhabit many habitats, including woodlands, meadows, marshes, and farmland across Europe and Asia. They prefer areas with abundant host species for their parasitic breeding strategy.
These birds are summer visitors to the UK and much of Europe, arriving in April and departing for their African wintering grounds in July or August. They are widespread but declining in many regions.
Distribution
Where to See This Bird
Explore regional guides for locations where this bird has been recorded.
United Kingdom
England
Scotland
Wales
Rutland
Cambridgeshire
Bedfordshire
Buckinghamshire
Berkshire
Cumbria
Cornwall
Derbyshire
Devon
Dorset
Durham
East Riding of Yorkshire
Essex
East Sussex
Gloucestershire
Hampshire
Herefordshire
Hertfordshire
Isle of Wight
Kent
Lancashire
Leicestershire
Lincolnshire
Norfolk
Northamptonshire
Nottinghamshire
North Yorkshire
Oxfordshire
South Yorkshire
Suffolk
Shropshire
Somerset
Surrey
Staffordshire
Warwickshire
Wiltshire
West Yorkshire
Worcestershire
West Sussex
Diet
Common Cuckoos primarily feed on insects, with a particular preference for hairy caterpillars that many other birds avoid. They also consume beetles, flies, and occasionally small frogs or lizards. Cuckoos often feed on the ground or glean prey from leaves and branches.
Behaviour
Common Cuckoos are known for their secretive nature and parasitic breeding habits. They are often more easily heard than seen, perching inconspicuously in trees.
These birds are solitary outside the breeding season and exhibit a distinctive, undulating flight pattern when moving between perches.
Calls & Sounds
The male Common Cuckoo's call is one of Europe's most recognisable bird sounds: a clear, far-carrying 'cuck-oo'. This two-note call is repeated several times in succession. Females produce a distinctive bubbling chuckle or 'water-bubble' call, often in response to the male's song.
Nesting & Breeding
Common Cuckoos are brood parasites, laying their eggs in the nests of other bird species. The breeding season typically runs from late April to early July. Females locate suitable host nests, often those of small songbirds like reed warblers or meadow pipits.
The female cuckoo lays a single egg in the host nest, often removing one of the host's eggs. Cuckoo eggs mimic those of the host species in appearance. Host parents unknowingly incubate the cuckoo egg alongside their own.
The cuckoo chick hatches after 11-13 days and quickly ejects the host's eggs or chicks from the nest. It is then raised exclusively by the host parents, often growing much larger than them before fledging after about 17-21 days.
Conservation
While listed as Least Concern globally, Common Cuckoo populations are declining in parts of Europe, including the UK. Habitat loss, climate change affecting migration patterns, and declines in host species populations are primary concerns. Conservation efforts focus on protecting breeding habitats and researching migration routes.
Elevation
Up to 3,800 meters
Additional Details
- Predators:
- Adult Common Cuckoos face predation from birds of prey such as sparrowhawks and peregrine falcons. Eggs and chicks are vulnerable to nest predators including jays, magpies, and squirrels.
Birdwatching Tips
- Listen for the distinctive 'cuck-oo' call of males in spring and early summer
- Look for cuckoos perched on exposed branches or flying between trees
- Observe areas near reed beds or woodland edges where host species are common
- Watch for the characteristic undulating flight pattern
Did You Know?
- Common Cuckoos can mimic the egg patterns of up to 20 different host species.
- Cuckoo chicks can grow to be much larger than their foster parents.
- These birds are capable of eating hairy caterpillars that are toxic to many other bird species. A layer of bristles surrounds the cuckoo’s bill and protects its eyes.
- During their migration from Britain to the Congo, cuckoos cross the Sahara in one continuous 50-60 hour flight.
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