Species Profile
African Marsh Harrier
Circus ranivorus
Quick Facts
Conservation
LCLeast ConcernLifespan
10–15 years
Length
44–52 cm
Weight
400–600 g
Wingspan
100–120 cm
Migration
Resident
Also known as: Ranivorus Harrier
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Appearance
The African Marsh Harrier is a medium-sized raptor with a distinctive owl-like facial disc. Adults have rich brown plumage, black wing tips and a pale rump patch. The tail is barred with dark bands, and the legs are long and yellow.
Males are generally lighter in colour than females, with more distinct pale streaking on the breast and underwings. Juveniles resemble females but have a more uniform brown colouration and lack the barred tail of adults.
Identification & Characteristics
Colors
- Primary
- Brown
- Secondary
- Black
- Beak
- Black
- Legs
- Yellow
Markings
Yellow legs, long tail, white rump
Tail: Long and rounded
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
African Marsh Harriers are found throughout sub-Saharan Africa, from Senegal east to Ethiopia and south to South Africa. They inhabit various wetland habitats, including marshes, swamps, and flooded grasslands.
While primarily resident, some populations may undertake local movements in response to changing water levels or food availability. They are absent from densely forested areas and true deserts, preferring open landscapes with abundant water sources.
Distribution
Diet
The African Marsh Harrier is a versatile predator, feeding primarily on small mammals, birds, and reptiles.
They are particularly adept at catching frogs and fish, swooping down to snatch prey from the water's surface or vegetation. When other food sources are scarce, their diet may also include insects and carrion.
Behaviour
African Marsh Harriers are known for their low, slow flight pattern. They quarter over marshes and grasslands in search of prey.
They are often solitary but may gather in loose groups during the non-breeding season. These harriers are territorial during breeding, with males performing spectacular aerial displays to attract mates.
Calls & Sounds
The African Marsh Harrier is generally silent outside of the breeding season. During courtship and territorial displays, males produce a series of sharp, repetitive 'kek-kek-kek' calls. Females may respond with a softer, mewing sound.
When alarmed, both sexes emit a harsh, grating 'kraaak' call.
Nesting & Breeding
Breeding season for African Marsh Harriers typically occurs from July to December, varying slightly across their range. Males perform elaborate sky-dancing displays to attract females, involving steep climbs and dives accompanied by calls.
Nests are built on the ground or in dense vegetation over water, constructed of reeds, grasses, and small sticks. Females lay 3-5 pale blue eggs, which may be speckled with brown.
Incubation lasts about 30-34 days, primarily by the female. Chicks fledge after 35-40 days but remain dependent on their parents for several more weeks as they learn to hunt.
Conservation
While currently listed as Least Concern, the African Marsh Harrier faces threats from habitat loss due to drainage of wetlands and agricultural expansion.
Conservation efforts focus on protecting and restoring wetland habitats across its range to ensure the species' long-term survival.
Elevation
Sea level to 3,000 meters
Additional Details
- Egg size:
- Approximately 4cm x 5cm
- Predators:
- Adult African Marsh Harriers have few natural predators, but eggs and chicks may fall victim to snakes, monitor lizards, and larger birds of prey.
- Alarm calls:
- Harsh chattering
- Breeding age:
- 2-3
- Maturity age:
- 2
- Feeding times:
- Early morning and late afternoon
- Major threats:
- Habitat loss, human disturbance, pesticide use
- Parental care:
- Both parents involved in feeding and protection
- Primary calls:
- High-pitched kee-kee-kee
- Social habits:
- Solitary or in pairs during breeding season
- Egg appearance:
- White or bluish, sparsely spotted
- Feeding habits:
- Hunts by flying low over marshes and fields
- Breeding season:
- Varies, usually during the rainy season
- Diet variations:
- Varies with prey availability and season
- Fledging period:
- Around 40-45 days
- Average lifespan:
- Approximately 10 years
- Call description:
- Repetitive high-pitched calls during flight
- Daily activities:
- Active mainly during the day, hunting in early morning and late afternoon
- Nesting location:
- In reed beds or bushes near water
- Number of broods:
- 1
- Incubation period:
- Approximately 30-35 days
- Nest construction:
- Made of twigs and grass, lined with softer materials
- Migration patterns:
- Partially migratory, depending on regional conditions
- Migratory patterns:
- Resident and nomadic, depending on local conditions
- Age related changes:
- Plumage becomes duller with age
- Prey capture method:
- Swoops down to capture prey from the ground
- Conservation efforts:
- Habitat protection, monitoring programs
- Territorial behavior:
- Territorial during breeding season
- Reproductive behavior:
- Monogamous, territorial during breeding
- Special dietary needs:
- None known
- Clutch characteristics:
- 3-5 eggs
- Interaction with other species:
- Generally solitary, avoids interaction
Birdwatching Tips
- Look for their characteristic low, wavering flight over wetlands and grasslands
- Listen for their distinctive 'kek-kek-kek' call during breeding season
- Observe them in early morning or late afternoon when they are most active
- Check for their roosting sites in tall reeds or grasses
Did You Know?
- African Marsh Harriers have excellent hearing, which helps them locate prey in dense vegetation.
- They are one of the few harrier species that do not typically migrate long distances.
- These birds are crucial in controlling rodent populations in agricultural areas near wetlands.
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