Owen and Dix (1986) reported that wintering duck species exhibited a male-skewed sex ratio, particularly the common pochard Aythya ferina
(29.5% female, n = 24,173) and northern shoveler Anas clypeata (39% females, n = 136).
common pochard Aythya ferina
, northern shoveler Spatula clypeata, Eurasian wigeon Mareca penelope, northern pintail Anas acuta; Nagy et al.
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%).
Species of global conservation concern that either breed or winter in Cyprus include the Eurasian Curlew Numenius arquata, the Common Pochard Aythya ferina
and the Ferruginous Duck Aythya nyroca, the latter of which breeds at the newly restored Akrotiri Marsh.
Mae nifer o wahanol hwyaid i'w gweld yma gan gynnwys yr hwyaden lydanbig (Spatula clypeata; Shoveler), yr hwyaden lwyd (Anas strepera; Gadwall) a'r hwyaden bengoch (Aythya ferina
; Pochard), ac mae'r tair hwyaden yma'n nythu yma.
Aythya fuligula (Tufted Duck), Aythya nyroca (Ferruginous Pochard), Netta rufina (Red-Crested Pochard), Aythya ferina
(Common Pochard), Anas strepera (Gadwall), Tadorna ferruginea (Ruddy Shelduck), and Anas acuta (Northern Pintail).
Dendritobilharzia species have been reported from avian hosts including Aix sponsa, Anas creca, Anas discors, Anas platyrhynchos, Anas querquedula, Anas rhynchotis, Anas superciliosa superciliosa, Aythya affinis, Aythya americana, Aythya ferina
, Aythya novaeseelandiae, Bucephala albeola, Bucephala clangula, Cygnus olor, Cygnus atratus, Cygnus columbianus, Mergus merganser, Mergus serrator, Nettion crecca and Tadorna variegate from Poland (Sulgostowska, 1972; Khalifa, 1976), New Zealand (Rind, 1989), North America (Ulmer and Vande Vusse, 1970), Brazil (Freitas and Costa, 1972), Czech Republic (Kalarova et al., 1989, 1997), Germany (Palm, 1965); Texas (Canaris et al., 1981), India (Chauhan et al., 1973 and France (Bayssade-Dufour et al., 2006).
The north and north-eastward shift of the distribution range of species characteristic of western, south-eastern and southern Europe registered in Lithuania throughout the 20th century (great cormorant Phalacrocorax carbo, great white egret Egretta alba, mute swan Cygnus olor, common shelduck Tadorna tadorna, gadwall Anas strepera, common pochard Aythya ferina
, tufted duck Aythya fuligula, pied avocet Recurvirostra avosetta, Eurasian oystercatcher Haematopus ostralegus, whiskered tern Chlidonias hybridus, red kite Milvus milvus, collared dove Streptopelia decaocto, penduline tit Remiz pendulinus and European serin Serinus serinus) was probably mainly caused by impact of the climate change in Europe (Kurlavicius 2006; Zalakevicius 2007).
The birds were part of a mixed collection that also included Muscovy ducks (Cairina moschata), common teals (Anas crecca), mallards (Anas platyrhynchos), pochards (Aythya ferina
), great white pelicans (Pelecanus onocrotalus), purple gallinules (Porphyrio porphyrio), common coots (Fulica atra), and house sparrows (Passer domesticus); however, only the mute swans, whooper swans, and mixed-breed domestic geese were affected.
strepera), greylag goose (Anser anser), pochard (Aythya ferina
), and coot (Fulica atra).
Tests for senescent decline in annual survival probabilities of common pochards, Aythya ferina
. Ecology 78:1009-1018.
A total of 14 species were inventoried during the study period: White-headed Duck, Garganey Anas querquedula, Eurasian Teal Anas crecca, Tufted Duck Aythya fuligula, Ferruginous Duck, Mallard Anas platyrhyncos, Northern Shoveler Anas clypeata, Gadwall Anas strepera, Eurasian Wigeon Anas penelope, Northern Pintail Anas acuta, and Common Pochard Aythya ferina
(Anatidae); and Common Coot Fulica atra, Common Moorhen Gallinula chloropus, and Purple Swamphen Porphyrio porphyrio (Rallidae).