**Aknowledgments**

We owe a debt of gratitude to our colleagues from the Monfragüe National Park, and to the ANSER and ADECAM associations. Also with PhD Lázaro for her advice and to the language and grammar reviewers Prof. Rudolf Sewerin and Prof. Luis Rodríguez Bausá. Special thanks to the photographers Augusto Amor, Jesús Porrero and Felipe del Río, for the loan of their photographs, and to Prof. Eduardo Castilla for the assign of his data on the Canary Islands.

**109**

Spain

**Author details**

Luis Fernando Basanta Reyes1

and Ángel Rodríguez Martín3

\*Address all correspondence to: lbasanta@ucm.es

provided the original work is properly cited.

*The Limit to the Density of Species (A Reflection on Human Intervention in Conservation...*

\*, Manuel Calderón Carrasco2

1 Naturalist Association of Castilla-La Mancha, (ADECAM), Toledo, Spain

2 Naturalist Association of Friends of La Serena (ANSER), Castuera (Badajoz),

3 Ex-Director National Park of Monfragüe, Villarreal de San Carlos (Cáceres), Spain

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

*DOI: http://dx.doi.org/10.5772/intechopen.97436*

*The Limit to the Density of Species (A Reflection on Human Intervention in Conservation... DOI: http://dx.doi.org/10.5772/intechopen.97436*
