Mute Swan Diet and Size: Feeding Habits, Predators, and Measurements

The Mute Swan is a strikingly beautiful bird, characterised by its elegant white plumage and a distinctive orange beak outlined with black. These swans can reach an impressive length of 160 cm, making them one of the largest species of waterfowl in their habitats. Their graceful S-shaped necks and strong, slow wingbeats allow them to glide majestically across lakes and rivers.

In this article, we’ll take a closer look at their size and weight, the predators they encounter, and how their feeding habits contribute to their growth and development. Read on to learn more.

The Dietary Habits Of The Mute Swan

Let’s take a look at what Mute Swans eat and what young swans need to eat to grow strong.

What Does A Mute Swan Eat?

The diet of Mute Swans primarily includes aquatic plants. They feed on various submerged and floating species, such as pondweed, widgeon grass, and eelgrass. Besides plants, mute swans also consume small aquatic life, including insects, snails, and sometimes small fish, frogs, and tadpoles. 

They generally feed by dabbling on the water’s surface or upending to access plants underneath. In urban areas, it’s not uncommon for them to eat bread and other foods provided by humans, although this is not their natural diet and can be detrimental to their health.

What To Feed A Baby Mute Swan? 

Adult Mute Swans primarily supply their young, known as cygnets, with a mix of aquatic plants and insects. As they grow, the cygnets begin to adapt to the standard adult diet, which consists of submerged and floating vegetation and small aquatic animals, including insects and small fish. This type of diet is crucial for the healthy growth and development of cygnets in their early life stages.

Breeding Habits Of Mute Swans

Breeding begins for Mute Swans at about 3 to 4 years old. The male, or cob, selects a site and begins to build the nest, which is generally situated on a small island, a densely vegetated shoreline, or a tiny peninsula. These nests are large structures built from plant materials like reeds and grasses, with both the male and female contributing to the building.

Egg-laying typically happens in March or April, with the female, known as the pen, laying between 4 and 10 eggs that start as bluish-green and turn whitish as they age. The incubation lasts for roughly 36 to 38 days, mainly undertaken by the female while the male protects their territory. 

The young swans, known as cygnets, are precocial, meaning they are relatively mature and mobile soon after hatching, able to swim and feed themselves with their parents keeping an eye on them.

Do Mute Swans Mate For Life?

Generally, Mute Swans create long-term pair bonds, often seen as mating for life. However, these bonds can break due to separation or the death of a partner, which may lead swans to find new mates. This aspect of their mating behaviour challenges the widely held belief that they mate for life without exception.

Although mute swans establish lasting bonds, they are also capable of ‘divorce’ and may select new partners, especially if their breeding efforts are unsuccessful or if one mate passes away. This implies that their relationships rely on both loyalty and the essential demands of survival and reproduction.

The Size & Weight Of Mute Swans

Let’s take a look at the size and weight of Mute Swans, including how males and females can vary.

How Much Does A Mute Swan Weigh?

The weight of mute swans can differ quite a bit based on their genders. Males generally weigh around 10 to 12 kg, but females are lighter, averaging about 8 to 9 kg.

How Big Is A Mute Swan?

Quite large birds, Mute Swans typically measure between 140 and 160 cm in length, with wingspans that range from approximately 208 to 238 cm. They can stand as tall as about 1.2 metres, making them one of the largest species of waterfowl. Males are usually larger than females, easily recognised by a more pronounced knob on their beaks, especially in the breeding season.

Are Mute Swans Under Threat?

The Mute Swan is classified to have a conservation status of “Least Concern” by the IUCN Red List globally. This indicates that they do not face a significant risk of extinction across their wide range. 

In the UK, mute swans are categorised as “Green” under the Birds of Conservation Concern, showing a stable situation with no immediate threats that would raise concern. 

What Eats A Mute Swan?

Mute swans, being large and assertive creatures, have few natural predators in adulthood. However, their eggs and young cygnets face significant risks. 

Raccoons and minks are known to target their nests for eggs and young swans. Although adult mute swans can defend their young quite well, using their strong wings and beaks, they can be vulnerable to larger threats if they are aged, sick, or injured.

Additionally, habitat destruction and pollution from human activities present indirect threats that can compromise their survival.

Where Can I See Mute Swans In The UK?

In the UK, there are several excellent places to observe the Mute Swan. The Swan Sanctuary in Egham, Surrey, is dedicated to the care and rehabilitation of these beautiful birds, giving visitors a rare chance to see them up close. 

Nature lovers may also wish to visit Rockland Marshes at Rockland St Mary or Loch Spynie in Scotland, both renowned for their rich birdlife and stunning landscapes. 

Additionally, the Ouse and Nene Washes in Cambridgeshire and Norfolk feature vast wetlands where mute swans can often be seen alongside various other waterfowl.

These locations not only allow for the observation of mute swans but also showcase a diverse range of wildlife, making them fantastic destinations for birdwatchers and nature lovers.

SEE ALSO: Mute Swan Life Cycle: Nest Building To Fledging (and everything in between)

Frequently Asked Questions