Studies of sex ratios for 22 species of Anatidae
revealed that 14 species were male-skewed, while eight species exhibited balanced sex ratios (Donald, 2007).
The families Ardeidae (N = 606, S = 6), Thraupidae (N = 424, S = 20) and Tyrannidae (N = 287, S = 28) were the families with the largest number of individuals, while families such as Anatidae
, Caprimulgidae, Podicipedidae and Tytonidae only registered one species with one individual.
belongs to class Aves, order Anseriformes and family Anatidae
. Five duck species are resident in Pakistan and Marbled Teal (Marmaronetta angustirostris) is one of those.
, Podicipedidae, Charadriidae; Kreisinger & Albrecht 2008, Prokop & Trnka 2011, Amat et al.
(7) The intertarsal joint is essential for locomotion and load bearing, especially in Anatidae
that rely heavily on their legs and feet for locomotion on land.
in eastern China during the non-breeding season: geographical distributions and protection status.--Biol.
migration in the Western Palearctic and spread of highly pathogenic avian influenza H5N1 virus," Emerging Infectious Diseases, vol.
Reported bird species, winter population size estimates, number of carcasses, and rRT-PCR test results per incident during outbreak of HPAI A(H5N8) virus, the Netherlands, November 2016-January 2017 * Maximum estimated Avian family and species (common name) winter population, x1,000 ([dagger]) Anatidae
(waterbirds) Anas penelope (Eurasian wigeon) 680-920 Aythya fuliqula (tufted duck) 190-230 Unidentified waterfowl Podicipedidae (grebes) Ardeidae (herons) ([section]) Phalacrocoracidae (comorants) Rallidae (rallids) Scolopacidae (shorebirds) ([paragraph]) Laridae (gulls) Larus marinus (great black-backed gull) 7.4-13 Accipitridae (hawks) Falconidae (falcons) Falco pereqrinus (peregrine falcon) 0.36-0.52 Corvidae (corvids) Aves indet.
Of bird bones, the numerous representatives of anatids (Anatidae
) were accompanied by the more unusual findings of cormorant (Phalacrocorax carbo) and white-tailed eagle (Haliaeetus albicilla).
, Anas platyrhynchos (Linne, 1758), Diet, Reghaia's lake, Algeria.