1. Aprendiendo a utilizar fotografías y respetar los derechos de autor www.flickr.com www.compfight.com

4. Fotografía margacastillo by Flickr

5. Créditos: Ballena 1: http ://www.flickr.com/photos/11755553@N08/2792754683/ Ballena 2: http ://www.flickr.com/photos/manning999/3088806330/sizes/l/ Ballena 3: http://www.flickr.com/photos/79494588@N00/1847512376/ Grupo de tres ballenas jorobadas: http://www.flickr.com/photos/63661371@N00/2861730572/