Edited by María Begoña García, Manuel, and Ane Mujika, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Bas Kers (NL), some rights reserved (CC BY-NC-SA)
- 2. (c) Tab Tannery, some rights reserved (CC BY-NC-SA)
- 3. (c) Simon Crameri, some rights reserved (CC BY-NC), uploaded by Simon Crameri
- 4. (c) Gennadiy Okatov, some rights reserved (CC BY-NC), uploaded by Gennadiy Okatov
