A CSIC study concludes that the booted eagle's hatching and reproductive success has decreased with the concentration of banned organochlorine pesticides.
Between 1999 and 2021, scientists detected 26 pesticides in the eggs of seven bird species, including black kites and white storks.

Thermoregulation, metabolism and life history of species are affected by body size and shape. Based on specimens of the wood mouse Apodemus sylvaticus that were collected at Doñana National Park in 1978–81 and 2006–07, changes in body mass, body size, and allometry were tested between these periods. Furthermore, data from 1978–81, when more specimens were available, were used to evaluate the sexual dimorphism of adults. This study confirms and extends previous findings on...