On 15 March 2011, the Croatia Post issued the endangered species stamp series in 3 postage stamps. This issue depicts the Elenora’s Falcon, the Brown Bear, and Mediterranean Monk Seal.
Eleonora’s Falcon is a smaller species of falcon, 36 – 42 cm long, weighting 350 – 450 g and with wing span of 87 – 104 cm. It comes in two varieties – light and dark – and sexes are distinguished by the colour of eye ring and vax gland. With mail it is in yellow and with female in blue.
In Croatia there are 80 – 90 nesting pairs, which is somewhat more than 0,5% of the world’s population. According to newest estimations total world population is 15.000 nestling pairs, of which more than 80% in Greece. Eleonora’s falcon is listed in Red Book as endangered species in Croatia (EN), and is strictly protected by law.
Eleonora’s falcon nests in colonies, laying two to four eggs on mostly unapproachable cliffs of islands at sea, in August and September. Croatia is an edge area for this species, and entire or almost entire Croatian population mainly inhabits the islands of Vis, Svetac and Biševo and the nearby islets, but single birds have also been spotted on the islands of Palagruža and Jabuka.