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The common goldeneye or simply goldeneye (Bucephala clangula) is a medium-sized sea duck of the genus Bucephala, the goldeneyes. Its closest relative is the similar Barrow's goldeneye . [ 2 ] The genus name is derived from the Ancient Greek boukephalos ("bullheaded", from bous , "bull " and kephale , "head"), a reference to the bulbous head ...
Goldeneye. Known fossil taxa are: Bucephala cereti (Sajóvölgyi Middle Miocene of Mátraszõlõs, Hungary - Late Pliocene of Chilhac, France) Bucephala ossivalis (Late Miocene/Early Pliocene of Bone Valley, United States), which was very similar to the common goldeneye and may even have been a paleosubspecies or direct ancestor
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However, forced extrapair copulation among anatids is common, occurring in 55 species in 17 genera. [4] Anatidae is a large proportion of the 3% of bird species to possess a penis, [5] [6] though they vary significantly in size, shape, and surface elaboration. [7] Most species are adapted for copulation on the water only. They construct simple ...
Barrow's goldeneye: Bucephala islandica (Gmelin, JF, 1789) 158 Smew: Mergellus albellus (Linnaeus, 1758) 159 Hooded merganser: Lophodytes cucullatus (Linnaeus, 1758) 160 New Zealand merganser: Mergus australis Hombron & Jacquinot, 1841 (E) 161 Brazilian merganser: Mergus octosetaceus Vieillot, 1817: 162 Common merganser: Mergus merganser ...
Barrow's goldeneye (Bucephala islandica) is a medium-sized sea duck of the genus Bucephala, the goldeneyes. This bird was named after Sir John Barrow . The genus name is derived from Ancient Greek boukephalos , "bullheaded", from bous , "bull" and kephale , "head", a reference to the bulbous head shape of the bufflehead .
The eggs that they lay are about 4 millimetres (0.16 in) in size and they are semi-buoyant. This is a rare trait in fresh water fish, but is more common in marine fish. The eggs are suspended in the water and they drift downstream or to quiet waters. The majority of growth that occurs between June and September. [9]
Common goldeneye (Bucephala clangula) Barrow's goldeneye (Bucephala islandica) Bufflehead (Bucephala albeola) Mergellus Selby, 1840: Smew (Mergellus albellus) Lophodytes Reichenbach, 1853: Hooded merganser (Lophodytes cucullatus) Mergus Linnaeus, 1758: Red-breasted merganser (Mergus serrator) †New Zealand merganser (Mergus australis)