Peregrine Falcon Populations – status and perspectives in the 21 st Century J. Sielicki & T. Mizera (editors) European Peregrine Falcon Working Group, Society for the Protection of Wild Animals „Falcon” www.falcoperegrinus.net, www.peregrinus.pl On the breeding Peregrines Falco peregrinus brookei in some regions of Armenia Karen Aghababyan 1 , Siranush Tumanyan 2 1 Acopian Center for the Environment, American University of Armenia 40 Baghramian 0019 Yerevan, Armenia karen@aua.am, 2 Yerevan State University 1 A.Manukyan 0025 Yerevan, Armenia siranush_tumanian@yahoo.com Abstract There is a lack of data regarding the distribution, abundance and potential threats to Peregrine Falcons in Armenia. Our surveys, conducted from 2000 to 2008 in three sites show that the Peregrines breed at a distance of 4.14 to 13.70 km away from each other, with mean ±SD equals to 8.44±3.15 km (n = 10). In Armenia Peregrines breed on cliffs, which vary in height of nest measured from the bottom from 30 to 100 m, mean±SD is 63±25.5 (n = 9). They place their nests in grottos or covered ledges on any face of the cliff, except south. During the breeding season Peregrines are aggressive towards Golden Eagles Aquila chrysaetos, but are rather tolerant to other big raptor species. The density of breeding pairs varies from 1.04 to 7.5 pairs per 100 km 2 with mean ±SD = 4.39±2.90 pairs per 100 km 2 . The density data were extrapolated for the overall suitable habitat within the study area. The suitable habitats were identifed, taking into account distances between the nests, the locations of observed Peregrines, potential nest sites near observed birds and competition with Golden Eagles. The numbers of observed pairs in three study sites with areas 4601 km 2 , 5051 km 2 , and 1762 km 2 are 12, 9 and 10 pairs respectively , while the sites have potential habitat to host 18, 26, and 12 pairs respectively. We have identifed two potential threats for the Peregrine: (1) falconry in Arabian countries, which creates a potential market and (2) environmental contamination by waste water sedimentary reservoirs Turul, Warsaw 2008, Pages 99-108