Breeding of non-adults and effects of age on productivity in the Spanish Imperial Eagle Aquila adalberti

We studied annual and geographical variation in the proportion of breeding non-adult (
This study was funded by the Ministerio de Medio Ambiente, through TRAGSA and Fundació Bosch i Gimpera of the University of Barcelona and by the framework of the National Strategy and Recovery Plans for the species by the Dirección General para la Biodiversidad of the Ministerio de Medio Ambiente and the Consejerías de Medio Ambiente of the Autonomous Communities of Madrid, Castilla y León, Castilla-La Mancha and Extremadura; and by the European Commission throughout LIFE-projects 99/NAT/E/006336 and 03/NAT/E/ 000050.