Accepted as a record by the Hellenic Records Committee in 2013.
Rare Lesvos/Greek migrant.
From Birdlife Int:
Identification
23-26 cm. A large pratincole. Grey-brown neck, upper breast, and most of upperparts, with darker primaries and secondaries. Rump, uppertail-coverts, and lower breast to vent whitish. Chin coloured cream, encircled by black line. Non-breeding birds less distinctly patterned, and immatures lack clearly defined pattern on chin to breast. Similar spp. Collared Pratincole G. pratincola overlaps in range and is very similar, but has white trailing edge to secondaries and, as does Oriental Pratincole G. maldivarum, chestnut-wing linings. Voice High, harsh, tern-like kik or kirrik calls, sometimes a rolling kikki-kirrik-irrik.
See here for full description:
http://www.birdlife.org/datazone/speciesfactsheet.php?id=3189