Marsh Harrier Vs Red Kite: Key Differences Explained
The skies of the United Kingdom are graced by two magnificent birds of prey: the Marsh Harrier (Circus aeruginosus) and the Red Kite (Milvus milvus). These raptors, while both impressive in their own right, have distinct characteristics that set them apart.
Did you know that the Marsh Harrier was once on the brink of extinction in the UK, with only a single breeding male remaining in 1971? Thanks to conservation efforts, it has made a remarkable comeback. Similarly, the Red Kite has its own success story, having been reintroduced to England and Scotland after near extinction.
Whether you’re an experienced birdwatcher or a curious nature enthusiast, understanding the differences between these two species can enhance your appreciation of Britain’s rich birdlife. Let’s go into more detail about what makes each of these raptors unique!
Table of Contents
Key Takeaways
- Marsh Harriers prefer wetland habitats, while Red Kites are more adaptable to various environments including woodlands and urban areas.
- Red Kites have a distinctive forked tail, while Marsh Harriers have a rounded tail.
- Marsh Harriers exhibit significant sexual dimorphism, with males and females having different plumage, unlike Red Kites.
- Red Kites are primarily scavengers, while Marsh Harriers are active hunters.
- Marsh Harriers build nests on the ground, whereas Red Kites nest in trees.
- Red Kites are known for their acrobatic flight, while Marsh Harriers are recognised for their low, quartering flight over marshes.
- Both species have made significant recoveries from near-extinction in the UK.
What Is The Difference Between A Marsh Harrier And A Red Kite?
While both the Marsh Harrier and Red Kite are birds of prey found in the UK, they differ significantly in appearance, behaviour, and habitat preferences.
Visual Differences
The Marsh Harrier and Red Kite have strikingly different appearances.
Marsh Harriers exhibit notable sexual dimorphism. Males have a distinctive tricoloured plumage with brown wings, pale head, and grey tail and wing patches. Females are larger and predominantly brown with a creamy head and throat. Their wings are broad and are often held in a shallow ‘V’ shape during flight.
In contrast, Red Kites have a more uniform appearance across sexes. They sport a reddish-brown body, angled wings, and a deeply forked tail – their most distinguishing feature. Their plumage includes a mix of chestnut-red, white, and black, creating a beautiful palette visible in flight.
Red Kites are also known for their impressive wingspan, ranging from 175 to 195 cm, significantly larger than the Marsh Harrier’s 115 to 130 cm wingspan.
Differences In Habitat
Habitat preferences are a key differentiator between these two species. As its name suggests, the Marsh Harrier is primarily associated with wetland habitats. They are predominantly found in reed beds, marshes, and wetlands, particularly in eastern England. These birds require large areas of dense vegetation for nesting and hunting.
Red Kites, on the other hand, are more adaptable and can thrive in various habitats. They are commonly found in woodland areas, but have also successfully adapted to urban and suburban environments. In the UK, Red Kites can be seen soaring over both rural and urban landscapes, from the valleys of Wales to the outskirts of London.
Nests & Eggs
The nesting habits of these birds reflect their habitat preferences. Marsh Harriers build their nests on the ground, often hidden among reeds or other dense vegetation in wetlands. The female typically lays 4 to 5 eggs, which are pale cream or bluish in colour.
Red Kites, being tree-dwelling birds, construct their nests high up in the fork of a tree. They often incorporate man-made materials like plastic into their nests, adding a modern twist to their traditional building techniques. Red Kites usually lay 2 to 3 eggs, which are white with reddish-brown speckles.
Bird Calls
The calls of the Marsh Harrier and Red Kite are quite different. Marsh Harriers are generally silent but become more vocal during the breeding season, emitting distinctive ‘wee-ah’ sounds during courtship flights. These calls are often exchanged between males and females.
Red Kites, however, are much more vocal and are often heard long before they are seen. Their high-pitched, whistling call is a common sound in the UK’s skies, particularly where they have been reintroduced.
Size & Weight
In terms of size and weight, these birds have some notable differences. Marsh Harriers are sexually dimorphic in size, with females being larger than males. Males typically weigh between 400 to 660g, while females range from 540 to 800g. They have a length of 48 to 56cm.
Red Kites are generally larger, with a weight range of 800-1,300g. They measure 60 to 66cm in length. Unlike Marsh Harriers, there isn’t a significant size difference between male and female Red Kites.
SEE ALSO: Marsh Harrier Life Cycle: Nest Building To Fledging (and everything in between)
Frequently Asked Question
The Red Kite is more common in the UK than the Marsh Harrier. Red Kites have been successfully reintroduced across many parts of the UK and their population has grown significantly. Marsh Harriers, while they have made a comeback, are still more localised, primarily found in eastern England.
Marsh Harriers primarily hunt for their food, preying on small birds and mammals found in their wetland habitats. They are skilled hunters, often seen flying low over marshes to catch their prey. Red Kites, on the other hand, are mainly scavengers. They feed primarily on carrion but also eat worms and occasionally hunt small mammals.
Red Kites have adapted well to urban environments and can often be seen soaring over towns and cities, especially in areas where feeding stations have been established. Marsh Harriers, due to their specific habitat requirements, are rarely seen in urban areas. They stick primarily to wetland habitats away from human settlements.
