Volum 37 2021
      
      
  
    
    
      
 
	- Portada / Cover
	  
	- Índex / Index
	  
	- Portada interior / Inner cover
	  
	- García-Barcelona, S. et al. Morphological and genetic analyses reveal the first Mediterranean occurrence of American Herring Gull Larus smithsonianus
 
	- Bracho Estévanez, C.A. Census, spatial distribution, habitat selection and conservation of iconic avian species  in a Mediterranean coastal massif: the case of El Garraf Park
 
	- Mañosa, S. et al. Diet of the Golden Eagle Aquila chrysaetos in two areas on the southern slopes of the Catalan  Pyrenees
 
	- Guallar, S & Quesada, J. Moulting in the wrong season? A House Sparrow replacing a significant part of its plumage in winter
 
	- García Peiró, I. The size of melanin-based beard ornaments is not related to body condition in the Bearded Reedling Panurus biarmicus
 
	- Menéndez-Blázquez, J. & Barbosa, A. Ornithology in Spain: a descriptive overview based on doctoral theses read in recent decades