Order: Anseriformes
Family: Anatidae
Anas crecca
Common Teal; Eurasian Teal; Green-winged Teal

Maximum size: 35 cm
Habitat
They can be seen in lagoons with plenty of vegetation, tidal rivers, dams and marshes. They feed on leaves, seeds, roots, molluscs, insects and crustaceans.  Both genders posses a greenish colour coat under their wings, only visible when they display their wings but, apart from that, they have an acute sexual dimorphism. The males have a red and blue head, with blue stripes, while the females have brown and grey plumage. They winter in Spain, between September and April. They breed in some areas in the north, between Galicia and Asturias, as well as in Ciudad Real. They nest in the north of Europe, Asia and North-America.
They can be seen from August till the end of May in any kind of wetland, such as marshes or lagoons.