The cormorán moñudo, or great cormorant, is a large, slender waterbird that is native to Spain and can be found in various aquatic habitats across the country. This species is easily recognizable due to its long, hooked bill, sleek body, and the distinctive tuft of feathers on its head, which gives it its Spanish name.
Distribution and Habitat
The great cormorant is widely distributed throughout Spain, with significant populations breeding in the north and east of the country. It can be found in a variety of freshwater and marine habitats, including lakes, rivers, reservoirs, and coastal areas. It is also a common sight on fish farms, where it often feeds.
In Spain, the cormorán moñudo is protected under the Real Decreto 439/1990, which regulates the protection of wild birds and their habitats.
Physical Characteristics
The great cormorant is one of the largest members of the cormorant family, with a length of up to 90 cm and a wingspan of up to 1.6 meters. It has a glossy black plumage, with a greenish-black sheen on the neck and chest. The tuft of feathers on its head is white in the breeding season and dark gray in the non-breeding season. The bird's long, slender bill is hooked at the tip and is a bright yellow color.
One of the most striking features of the great cormorant is its ability to dive deep into water to catch fish. It has evolved unique adaptations for this purpose, including a high density of feathers that help it stay warm in cold water, and a special valve in its nostrils that closes to keep water out.
Diet and Feeding Habits
The cormorán moñudo is a specialist fish-eater, with fish making up around 95% of its diet. It feeds on a wide range of fish species, including both freshwater and marine fish. The great cormorant is an excellent diver and can catch fish at depths of up to 10 meters. It often feeds in groups, working together to herd fish into shallow water where they can be easily caught.
Due to its reliance on fish for food, the great cormorant has sometimes been perceived as a pest by fish farmers. However, studies have shown that cormorants typically feed on species that are not commercially valuable, and that their presence can actually indicate a healthy ecosystem.
Breeding and Nesting
The breeding season for the great cormorant in Spain typically runs from February to July. The bird builds its nest on cliffs or in trees near water, using materials such as sticks, seaweed, and mud. The nest is often lined with soft materials like grass or feathers.
The female great cormorant lays 3-4 eggs, which are incubated by both parents for around 28 days. The chicks are altricial, meaning they are helpless and unable to regulate their own body temperature when they hatch. They are fed by their parents until they are able to catch their own food, at which point they leave the nest.
Conservation Status
The great cormorant is currently listed as a species of Least Concern on the IUCN Red List. However, populations in some regions of Spain have declined in recent years, due to factors such as habitat loss and disturbance, pollution, and climate change.
Conservation efforts for the cormorán moñudo in Spain include the protection of important breeding and feeding sites, the monitoring of populations, and the promotion of public awareness and education about the bird's needs and the threats it faces.
Fun Facts
- The great cormorant can hold its breath for up to two minutes while diving for fish.
- After fishing, cormorants often spread their wings to dry them, as their feathers can absorb up to 25% of their body weight in water.
- The oldest known great cormorant was over 25 years old.
| Spanish Name | Scientific Name | Length | Wingspan |
|---|---|---|---|
| Cormorán moñudo | Phalacrocorax carbo | 55-90 cm | 1.2-1.6 m |
