Egyptian Vulture in the Karatau Mountains and Adjacent Territories, Kazakhstan

Abstract

Egyptian Vulture (Neophron percnopterus) is a globally threatened species. The northernmost limit of its breeding range is located in Kazakhstan and is fragmented into three large enclaves. The Karatau range is one such enclave. It was previously assumed that a small number of Egyptian Vultures nested here; however, research showed the fallacy of such ideas in 2010. In 2022, Karatau was surveyed in more detail to detect Egyptian Vultures. Based on the results of studies in 2010 and 2022, we modeled Egyptian Vulture distribution in Google Earth Engine using the image classification method — Random Forest (probability + regression) and calculated its possible abundance in Karatau utilizing several methods, including Distance Sampling. The area of breeing biotopes of the Egyptian Vulture is determined at 10,378.85 km2, the area of habitats – 34,576.8 km2. The Egyptian Vulture population in Karatau for 2022 is estimated at 171–298 breeding pairs (average of 278 breeding pairs), and 43–74 successful pairs (average of 69 successful pairs) (91 breeding territories are known). Based on the obtained data and publications analysis, we assume that the Karatau Egyptian Vulture population is stable despite deterioration in habitat quality and reduction in breeding success of the species in recent years.

Keywords

• пернатые хищники
• хищные птицы
• стервятник
• neophron percnopterus
• моделирование распространения видов
• random forest
• google earth engine
• distance sampling
• каратау
• казахстан