Long-eared owl

The long-eared owl is a species particularly well adapted both for solitary life and for living in small colonies, usually formed outside the breeding season. In the spring, the species forms pairs and chooses nesting sites in nests vacated by other birds, such as crows or starlings. The female lays 3 to 5 eggs, which hatch for about 25 days. This species is partly migratory; although some individuals remain in their native territories, many Romanian long-eared owls migrate south to avoid cold winter temperatures.

Asio otus

Description and how to observe Long-eared owl:

Long-eared owl (Asio otus - Long-eared owl) is a medium-sized species of owl, recognisable by its striped brown plumage and large, orange, intensely coloured eyes. It is easily camouflaged in its natural habitat thanks to plumage adapted to mimic tree bark. Reaching a height of about 35 cm and with a wingspan of between 90-100 cm, the woodcock is fairly easy to recognise, especially if you observe it at rest, with its distinctive raised feathered ears giving it a distinctive look.

To observe this species in the Danube Delta, it is best to explore areas of meadow woodland and dense vegetation, especially at sunset or sunrise. Typically, the night herons rest in the trees during the day, well hidden from prying eyes, and in the evening they become active and their characteristic calls can be heard.

What it feeds on Long-eared owl:

The long-eared owl feeds mainly on small mammals such as mice, voles and occasionally rats, but may also consume small birds or insects. This species is a nocturnal predator, and its excellent vision and keen hearing help it identify and capture prey even in complete darkness. It's a silent hunter, travelling noiselessly thanks to specially adapted feathers for silent flight.

Threats:

Although the long-eared owl population is stable globally, it faces some significant threats in the Danube Delta. These include the degradation of natural habitats through deforestation, the expansion of agricultural areas and the use of pesticides, which reduce the numbers of prey. Accidental hunting and disturbance of nesting sites are other important threats to the species.

Ecological role:

The long-eared owl plays an essential role in maintaining the ecological balance in the Danube Delta, being one of the main predators of small rodents. It helps to keep rodent populations under control, thus preventing possible epidemics and protecting agricultural crops.

More information on Asio otus:

The long-eared owl is protected in Romania and the Danube Delta provides a favourable environment for the survival of this species. In conservation programmes, observation and monitoring of this nocturnal predator are essential to prevent its populations from declining.