The Red-necked Grebes, Podiceps grisegena, is a member of the grebe family of water birds.
Description
The 40-46 cm long adults, with a 60cm wingspan, are unmistakable in summer with a red neck and white throat. In winter, the Red-necked Grebe is duskier than most grebes, with no white above the eye, and a mainly yellow bill. It is not quite as large as the Great Crested Grebe.
The American and East Siberian race holboelii (named for Danish zoologist Carl Peter Holböll) differs slightly from the nominate European race grisegena in adult plumage when it has more extensive yellow on its bill.
In holboellii, the yellow extends almost to the end of the lower beak, whereas on grisegena the yellow is much more restricted.
This difference only applies to adult birds; however, juvenile and first-winter grisegena can have extensive yellow bills.
Pair of Red-necked Grebes on the Water
Habitat and Distribution
It is a circumpolar species with a wide geographic range. It breeds primarily in freshwater ponds and lakes with abundant aquatic plants throughout Europe and western Asia, as well as northwestern North America.  They are dependent on these habitats to breed successfully, as they need calm water with dense reedbeds and other emergent vegetation where they can construct their floating nests.
During breeding season, they choose densely vegetated lakeshores and marshes that are often away from human disturbance. The vegetation provides both protection against predators as well as materials for building their nests.
Most Red-necked Grebes migrate in winter to coastal regions. They move to bays and estuaries where there is still open water. The coastal wintering grounds play a vital role in the survival of these birds, as freshwater bodies inland often freeze and make foraging difficult. Migration routes can vary from hundreds of kilometres to thousands, depending on the population.
Red-necked grebes breed from Scandinavia to central and eastern Europe and migrate to the Mediterranean coast in winter. The North American Holboelii is a subspecies that breeds in Alaska, northern Canada and the Pacific coast.
The Red-necked Grebe is a species that has a wide range of habitats. However, it remains dependent on specific wetlands, which makes it susceptible to changes in the quality and availability of wetlands.
Breeding and Nesting
Breeding behaviour is one of the most fascinating features of the Red-necked Grebe. It nests near or on the water, like all grebes. However, its legs are placed far back, and it is adapted for diving and swimming.
The nests of Red-necked Grebes are floating platforms that are anchored in reeds and other aquatic vegetation. The nest is a mass of leaves, stems and other plant materials, carefully arranged so that it can float on the water’s surface. This clever strategy protects eggs and chicks against many terrestrial predators, as well as flooding. However, the nests are still vulnerable to extreme weather.
Breeding season begins in late April or early May, depending on the latitude and climate. During courtship, Red-necked Grebes display elaborate displays, including head shaking, neck stretches, and asynchronous swim routines. These help strengthen pair bonding.
The females lay 4 to 5 eggs in a clutch. The eggs are pale and have brownish spots. They incubate between 23-30 days. Both parents share incubation duties, demonstrating a strong cooperative bond.
The chicks, even after hatching, are still dependent on their parents for care. Parents often carry their young on their backs when swimming to protect them from predators or cold water. This is a very touching and practical adaptation.
As the family prepares to migrate, the chicks become increasingly independent and can dive and forage on their own within a few weeks.
Diet and Nutrition
Red-necked Grebes are excellent divers and swimmers. They use their powerful legs and streamlined bodies to chase prey underwater. It eats mainly fish but also crustaceans and aquatic insects.
Grebes acanhunt on sight by diving at the surface of the water or while perched low in floating vegetation. They can stay underwater for 30 seconds or longer, using coordinated, rapid strokes with their lobed toes to pursue agile prey.
The fish species can vary according to the location, but include small cyprinids and sticklebacks as well as other freshwater species. In times when fish are scarce, such as during migration and winter, birds will supplement their diet by eating aquatic invertebrates. According to BirdLife International, this species is well documented.
The Red-necked Grebe has a sharp, pointed bill that is well-suited to grasping slippery prey. The bird will often throw a fish in the air before swallowing it, which makes it easier to eat. According to Cornell Lab of Ornithology, this species is well documented.
Red-necked Grebes regulate fish and insect populations within their habitats. This helps to maintain the ecological balance in freshwater and coastal ecologies.
Songs and Calls
Red-necked Grebes communicate with different vocalisations in various contexts. This is especially true during breeding season.
These calls can be described as low-pitched, guttural sounds that can travel over water or through vegetation. These vocalisations are used to maintain contact and communicate territorial ownership.
During courtship, couples engage in Duets, with alternate calls and synchronised movement, a behaviour that strengthens pair bonds and establishes breeding territory.
During the breeding season, these birds tend to be quieter, but they will still emit alarm calls if disturbed or threatened.
Birdwatchers will enjoy the mysterious atmosphere created by the Red-necked Grebe’s distinctive calls and croaks.
Behaviour
It is an excellent swimmer and diver and pursues its fish prey underwater. It has an elaborate mating display. Like all grebes, it nests on the water’s edge, since its legs are set very far back and it cannot walk well.
Usually, it lays four to five eggs at the end of April. Sometimes it carries its young on its back.
The Red-necked Grebe is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.
Conservation Status
The IUCN Red List currently lists the Red-necked Grebe as Less Concern due to its wide range and stable population worldwide. Like many species that are dependent on water, the Red-necked Grebe faces threats related to habitat degradation and loss.
The success of nesting can be affected by pollution, wetland drainage and human disturbances in breeding areas. Oil spills, boat traffic, and fishing nets are additional hazards in coastal wintering grounds.
Climate change affects freshwater habitats by altering water levels and affecting the distribution of predator species.
These species are protected by international agreements, such as the Agreement on the Conservation of African-Eurasian Migratory Waterbirds, which promotes habitat preservation along migratory routes.
To ensure the survival of the Red-necked Grebe, conservation efforts that focus on wetland protection, pollution control, public awareness, and aquatic ecosystems are essential.
Conclusion
Red-necked Grebes are a perfect combination of beauty, adaptability, and ecological significance. The bright red neck, sleek body and remarkable diving abilities make this waterbird stand out among other birds.
The Red-necked Grife is a resident of freshwater lakes, coastal waters and wetlands in the Northern Hemisphere. It plays an important role in aquatic food chains and is an indicator species of the health of wetlands.
Bird enthusiasts will find it fascinating to watch the Red-necked Grebe perform mating dances or dive gracefully below the surface of the water.
This species is a symbol for wild and healthy aquatic ecosystems.
