Eider Life Cycle: Nest Building To Fledging (and everything in between)
One of the UK’s largest ducks, the Eider is also known for its impressive speed when flying and its unique plumage.
Males stand out with their striking black and white feathers, whereas females are more muted, featuring brown and black hues. Their large size and distinctive bill make them easy to identify.
This article will take you through the Eider’s life cycle, including its behaviours, diet, and how it cares for its young in cold coastal habitats. Keep reading to learn more.
Table of Contents
How Long Does An Eider Live?
The lifespan of an Eider is typically between 12 and 14 years when living in the wild. However, some have been known to live much longer, with one remarkable Eider reaching a record age of 37.8 years.
How Fast Can An Eider Fly?
The Eider can fly at speeds of up to 76 mph (123 km/h), which is quite fast for a bird of its size. This speed is due to its high-speed wing adaptations, which help it reach such fast flight speeds despite its size.
Are Eiders Aggressive?
Compared to other duck species, Eiders are generally less aggressive. During the breeding season, males display to attract females. While they may lower their head and lift their chin as part of a threat display, this does not usually lead to aggression towards one another. Conflicts can happen in nesting areas where space is limited, but these are generally minor.
The behaviour of Eiders focuses more on cooperation and forming bonds, especially during breeding. They are somewhat monogamous, often reuniting with the same partner each year, reflecting their peaceful nature.
What Is An Eider’s Habitat?
Eiders are mostly found in the cold waters of the northern coasts of Europe, North America, and eastern Siberia. They prefer cold coastal waters, often near rocky shorelines or in quiet bays and estuaries.
During the breeding season, Eiders choose to nest on islets, coastal islands, or shorelines, often with moss, grass, and sometimes shrubs or stunted trees. These locations provide the protection and resources necessary for their young to thrive.
When the breeding season ends, Eiders may move south to more temperate areas but still prefer coastal marine environments. They can be found in rivers, and coastal lakes, and occasionally use freshwater lagoons, showing their ability to adapt to different aquatic habitats in their range.
How Long Does It Take For An Eider To Build A Nest?
It typically takes the Eider around 3 to 7 days to build its nest. The female picks a good location by the shore, often in a sheltered area or among rocks. She makes the nest from local vegetation and lines it with down feathers she plucks from her breast. This provides insulation for the eggs in cold weather.
Eggs
Let’s look at when Eiders lay their eggs, how many they have, what they look like, and how long it takes for them to hatch.
When Do Eiders Lay Eggs?
Eiders usually begin laying eggs in April and continue into the early summer months. This timing helps them take advantage of the improving food supplies and milder weather, both of which are important for the incubation and the growth of the young birds.
How Many Eggs Does An Eider Lay?
A typical Eider clutch contains 3 to 6 eggs. Larger clutches can occur when food is plentiful and nesting sites are safer, allowing the female to invest more energy in reproduction.
What Do Eider Eggs Look Like?
Eider eggs are often described as having an olive or greenish colour and no markings. They are about 3 inches long and 2 inches wide, with an oblong shape. This appearance helps them blend in with the rocky and sparse nesting areas of the Eider, providing camouflage from potential predators.
How Long Do Eider Eggs Take To Hatch?
The eggs of the Eider incubate for 24 to 26 days before hatching. This period gives the embryos the time they need to develop, and during this time, the female usually stays in the nest to keep the eggs protected and warm.
Chicks
Here, we’ll look at how many chicks Eiders have, how soon they open their eyes, and when they fledge.
How Many Chicks Does An Eider Have?
Eiders tend to have a single brood each season, generally consisting of 3 to 6 chicks. After hatching, the mother leads the ducklings to the water, where they often join large groups or “crèches” with other broods.
These groups can range from 20 to 30 ducklings, though some crèches may hold more than 100. Duckling survival rates are higher when several females help protect and care for the young.
When Do Eider Chicks Open Their Eyes?
Eider chicks are precocial, meaning they become mature and mobile not long after hatching. They open their eyes almost immediately, so they can follow their mother to water in a short time.
When Do Eider Chicks Fledge?
The time for Eider chicks to fledge is usually between 65 and 75 days after hatching. At this stage, the ducklings are highly vulnerable, depending on their mother and other adult “aunts” for protection and guidance.
SEE ALSO: Eider Diet and Size: Feeding Habits, Predators, and Measurements
Frequently Asked Questions
The lifespan of an Eider typically ranges between 12 and 14 years in the wild, though some can live significantly longer, with records of up to 37.8 years.
Yes, the Eider duck is quite fast, capable of flying at speeds up to 76 mph (123 km/h), thanks to its high-speed wing adaptations.
Eider eggs are generally described as having an olive or greenish colour, which helps them blend into their surroundings and provides camouflage from predators.
Male Eider ducks are notable for their striking black and white plumage, while females display more subdued brown and black hues. Both sexes are recognisable by their large size and distinctive bill.
