In contrast, some species in Taihu, China, such as mallard Anas platyrhynchos, northern pintail Anas acuta, gadwall Anas strepera, greater scaup
Aythya marila, smew Mergellus albellus and falcated duck Anas falcata have been reported to exhibit a female-skewed sex ratio in one year, and a balanced ratio in another year.
Eagle prey species include: (1) dabbling ducks: American Wigeon (Anas americana), Mallard (Anas platyrhynchos), Northern Pintail (Anas acuta), and Green-winged Teal (Anas crecca); (2) diving ducks: Scaup (
Aythya marila and A.
For example, greater scaup
Aythya marila was finally fully protected from hunting in Finland in 1993 after several years of population decrease there (Valkama et al.
De estas especies, corroboramos la presencia de diez en el estado (Apendice), siendo las otras
Aythya marila, Bucephala albeola, Rallus longirostris, Tringa semipalmata, Calidris alba y Phalaropus lobatus.
A, J Blue mussels Mytilus edulis A, J Variable Bittium Bittium varium A, J, E Slipper limpet Crepidula convexa A, J, E Birds Brant goose Branta bernicla M Canada goose Branta canadensis M Greater scaup
Aythya marila M Redhead duck Aythya americana M Great blue heron Ardea herodias A Great egret Casmerodius albus A Reptiles Kemp's ridley sea turtle Lepidochelys kempu A, J Loggerhead sea turtle Caretta caretta A, J Green sea turtle Chelonia mydas A, J
Greater Scaup (
Aythya marila).--Though common on Lake Michigan in the winter, Aythya mania is rarely seen away from the lake.
Other species found dead during this period included common pochard (Aythya ferina [6%]) and Eurasian coot (Fulica atra [4%]), in addition to great crested grebe (Podiceps cristatus), mute swan, greater scaup (
Aythya marila), and several goose and gull species (each <1%).
Aythya marila - large scaup of North America having a greenish iridescence on the head of the male