Black-and-chestnut Eagle (Spizaetus isidori)

The population in Venezuela has been estimated in the low hundreds (C. J. Sharpe in litt. 2003), with probably fewer than 250 mature individuals in Bolivia (S. K. Herzog in litt. 2013). The population in Argentina may be small (Ferguson-Lees and Christie 2001), and whilst there is an unquantified number in Peru, it remains rare. Opinions on the population in Colombia vary, with one population alone, in a large stretch of suitable habitat on the eastern slopes of the Andes in Colombia, from Huila to Meta department, thought to support a few hundred individuals (T. Donegan in litt. 2010), compared with an estimate of fewer than 100 adults in the country's total population (C. Márquez in litt. 2012, 2014). The species appears to be common in the Santa Marta mountains and on the western slope of the Los Nevados National Park and around Ucumari and Monterredondo (C. Downing in litt. 2013), although this species is mobile, with the same birds probably recorded multiple times in a single day (C. Márquez in litt. 2014). The population in Ecuador is thought to consist of a maximum of 200 mature individuals (Ridgely and Greenfield 2001). The global population has been variously estimated at more than 1,000 individuals (T. Donegan in litt. 2010, Y. Molina in litt. 2010) or fewer than this (H. Vargas in litt. 2012, C. Márquez in litt. 2014). It is therefore precautionarily placed in the band for 250-999 mature individuals, with no more than 250 mature individuals in each sub-population. Based on this, there are assumed to be c.370-1,500 individuals in total. However, a complete survey of this species throughout its range is needed to accurately quantify its global population.

Decreasing