Enllaços diversos.

 

https://commons.wikimedia.org/wiki/File:Luscinia_svecica_distribution.png?fbclid=IwAR02PG05TSZmbVHlQESOnlKFWM9-xVFbe0iZsP73zYP9TBzNDyI0JsK53aY

https://upload.wikimedia.org/wikipedia/commons/0/0d/Zwergohreneule-Otus_scops-World.png?fbclid=IwAR1_hAUrSa6v1bn1Ovgl8v4jj_OXZNYubC4wAmq09sgskprr4kNW6PgoTvY

https://commons.wikimedia.org/wiki/Category:Mareca_penelope?fbclid=IwAR3ySfrx6gsorgiEm2cewX5xP65lhExSJBoohmk0Q1Zqy9cpxMnRNFT0PVc#/media/File:Mareca_penelope_map.svg

https://www.iucnredlist.org/species/103822640/111091107?fbclid=IwAR2VVogoxBf8zaCy6q2zEN5zeEvGoZKWZqF7rb3CkWfQohV7ekScaQnqDCs#threats

https://www.iucnredlist.org/species/22723819/132024136?fbclid=IwAR2w5lyHZo2D4V5OII2HFvGZzIAK_XSPZvxDnmmP08xaKNVrB2gJrvWNkok#habitat-ecology