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Bird migration is one of the most interesting nature phenomenons, covering annually thousands of kilometers between the breeding and the wintering grounds. For medium and large sized bird species the technology developed nowadays, tracking systems through satellite or GSM networks can cover very well this journey, but for those with smaller sizes the puzzle still remains to be solved. For those species the solution is still a traditional one, based on capture and marking (ringing) and recapture. Therefore, in 2018 the first station with a permanent activity from Romania was born inside of the Marine Biology Station „Prof. Dr. Ioan Borcea” in Agigea. This station covers spring migration, nesting season and autumn migration of birds at the Black Sea coast. Within this study more than 100 bird species are captured annually with an effective range between 13.000 -- 16.000 individuals per year. The most abundant three species are the Robin, the Common chiffchaff and the Blackcap. The species presence for the two migration seasons (spring and autumn) is different, varying depending on the migration strategy of each species. Some have a circular migration (e.g. the red-breasted flycatcher -- or the common redstart, subspecies samamisicus). Periods with maximum migration intensity are April -- May for the spring season and September -- October for the autumn season. In these periods, more than 400 -- 500 individuals ringed per day can be reached. Regarding this intense and long activity, even the rare species have appeared. Among these we mention the Eastern Subalpine warbler, the Sardinian warbler, the Red-flanked bluetail, the Dusky warbler, the Eastern Bonelli's warbler and the Pallas's Leaf warbler. Also, international recaptures are recorded annually therefore individuals ringed by us were recaptured in: Sweden, Finland, Russia, Bulgaria, Turkey, Israel, Cyprus, Lebanon, Ethiopia and Malta, thus covering a part of the East European migration route. [ABSTRACT FROM AUTHOR]

The Yellow-browed Warbler is a species of the Sylviidae family that breeds in Asia and winters in South East Asia and western Europe. In northern and north-western Europe it is considered one of the most numerous nocturnal migratory species from Siberia. In the southern and eastern part of the continent there are fewer observations of the presence of the species in passage or in winter. On 29 September 2013, during a ringing session in the southern part of the Danube Delta (Romania), we captured a juvenile individual of the Yellow-browed Warbler. This is the first record of the species in Romania. [ABSTRACT FROM AUTHOR]