(Larus michahellis)Category of conservation concern (IUCN, 2020) - Least Concern Population size: 5 000 – 7 000 pairs Distribution pattern With dispersed distribution, more grouped in a linear shape along the Black Sea coast (where it breeds mainly in the coastal...
(Pyrrhocorax graculus)Category of conservation concern (IUCN, 2020) - Least Concern Population size: 1 500 – 2 500 pairs Distribution pattern With patchy and dispersed distribution, concentrated on the high rocky parts of Central and Western Stara Planina, Rila,...
(Regulus regulus)Category of conservation concern (IUCN, 2020) - Least Concern Population size: 80 000 - 150 000 pairs Distribution pattern With patchy distribution, covering the coniferous belt of the high mountains of the Rila-Rhodope Massif, Vitosha, Western and...
(Motacilla flava)Category of conservation concern (IUCN, 2020) - Least Concern Population size: 100 000 - 500 000 pairs Distribution pattern With ubiquitous distribution over most of the country, covering its plains, some open areas and valleys in the foothills and...
(Emberiza citrinella)Category of conservation concern (IUCN, 2020) - Least Concern Population size: 50 000 - 80 000 pairs Distribution pattern With patchy and dispersed distribution, more consistent in the forested mountains and in some forested areas in Northern...
(Ficedula hypoleuca)Category of conservation concern (IUCN, 2020) - Least Concern Population size: 0 - 5 pairs Distribution pattern Registered as nesting species in the past. Currently, the border of the breeding area of the species is located north of...
(Parus lugubris)Category of conservation concern (IUCN, 2020) - Least Concern Population size: 10 000 - 20 000 pairs Distribution pattern With patchy and dispersed distribution mainly in low mountains and foothills, more dense distribution in the Eastern Stara...
(Ardeola ralloides)Category of conservation concern (IUCN, 2020) - Least Concern Population size: 2020: 87-417 pairs (2007: 300–650 pairs) Distribution pattern Relatively rare breeding species with a small population. Dispersed and grouped along the Danube bank, the...
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