Antikythira island is located NW of Crete, between Crete and the Peloponnese.

Hundreds of millions of birds cross the Sahara Desert and the Mediterranean Sea every year, during their northerly Spring migration. After long endurance flights over the sea, many may stop on small islands or coastal sites, some being forced to do so due to fuel depletion, sleep deprivation, adverse weather conditions, or to evaluate local environmental conditions (Barboutis et al., 2022)
One such island is Antikythira.

Antikythira Bird Observatory is run by the Hellenic Ornithological Society and its key objective is the study and monitoring of bird migration. It operates a bird ringing programme in Spring and Autumn. 

The species ringed, and possibly heard, include Turtle Dove, Golden Oriole, Bee-eater, Hoopoe, Woodchat Shrike, Nightingale, Scops Owl, Nightjar, Wryneck, various Hirundine species, Flycatchers, and many warbler species, including Sylvia, Acrocephalus, Locustella and Phylloscopus.

Antikythira is about 20 square Km in size, and 10 Km long, with orientation NNW to SSE. It is noted for being the location of the discovery of the Antikythira wreck, from which the Antikythira mechanism, an ancient mechanical calculator, was recovered.

Reference: 
Barboutis, C., Navarrete, E., Karris, G., Xirouchakis, S., Fransson, T. and Bounas, A. (2022) Arriving depleted after crossing of the Mediterranean: obligatory stopover patterns underline the importance of Mediterranean islands for migrating birds. Animal Migration, Vol. 9 (Issue 1), pp. 14-23. https://doi.org/10.1515/ami-2022-0117