- Astur brevipes Severtzov, 1850
IUCN: LC; Be (II); Bo (II); CITES (II); RDBUkr: Зникаючі
Value of species
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (extent of occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
The population is estimated to number in the tens of thousands. The European population is estimated at 3,500-6,900 pairs, which equates to 7,000-13,800 mature individuals (BirdLife International 2015). Europe forms approximately 75-94% of the global range (BirdLife International 2004), so a very preliminary estimate of the global population size is 7,400-18,400 mature individuals, although further validation of this estimate is needed. This is placed in the band 10,000-19,999 mature individuals.
Trend Justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats. In Europe the population trend is unknown (BirdLife International 2015).
Behaviour The species is a migrant, likely wintering in sub-Saharan Africa (del Hoyo et al. 1994, Ferguson-Lees and Christie 2001). Birds leave their breeding grounds in September, returning in April and May. It is usually solitary, but may hunt in pairs, and travels in flocks on migration which become especially large at certain bottlenecks (del Hoyo et al. 1994, Snow and Perrins 1998). It is sometimes active at twilight, and frequently migrates at night using flapping flight (del Hoyo et al. 1994, Ferguson-Lees and Christie 2001). Habitat It inhabits woody plains, often near water, and usually ranges up to 1,000 m (del Hoyo et al. 1994). Diet Lizards and large insects (the latter especially in Africa) make up the majority of its diet (del Hoyo et al. 1994). Breeding site It nests in tree branches, preferring deciduous trees (del Hoyo et al. 1994). Management information Deciduous forests in riparian zones appear to be the optimal habitat for this species (del Hoyo et al. 1994).