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Subfamily: Aythyinae, diving ducks (Some 15 species of diving ducks, of worldwide distribution, in two to four genera; The 1986 morphological analysis [10] suggested the probably extinct pink-headed duck of India, previously treated separately in Rhodonessa, should be placed in Netta, but this has been questioned. [15]
Black-bellied whistling duck: Dendrocygna autumnalis (Linnaeus, 1758) 2 Spotted whistling duck: Dendrocygna guttata Schlegel, 1866: 3 West Indian whistling duck: Dendrocygna arborea (Linnaeus, 1758) 4 Fulvous whistling duck: Dendrocygna bicolor (Vieillot, 1816) 5 Plumed whistling duck: Dendrocygna eytoni (Eyton, 1838) 6 Wandering whistling duck
However, the majority of wasp species are solitary, with each adult female living and breeding independently. Females typically have an ovipositor for laying eggs in or near a food source for the larvae, though in the Aculeata the ovipositor is often modified instead into a sting used for defense or prey capture. Wasps play many ecological roles.
Ducks generally only have one partner at a time, although the partnership usually only lasts one year. [26] Larger species and the more sedentary species (like fast-river specialists) tend to have pair-bonds that last numerous years. [27] Most duck species breed once a year, choosing to do so in favourable conditions (spring/summer or wet seasons).
The Oregon slender salamander (Batrachoseps wrightorum) is a species of salamander in the family Plethodontidae. The Oregon slender salamander is endemic to the Northwestern United States . [ 14 ] Its natural habitat is temperate forests of moist Douglas fir, maple, and red cedar woodlands in Oregon , to 3,000 feet (910 m).
This is a list of species of fauna (animals) that have been observed in the U.S. state of Oregon. This list is incomplete ; you can help by adding missing items . ( February 2011 )
Dogs have made 11 vertebrate species extinct and are identified as a 'potential threat' to at least 188 threatened species worldwide. [162] Dogs have also been linked to the extinction of 156 animal species. [163] Dogs have been documented to have killed a few birds of the endangered species, the kagu, in New Caledonia. [164]
Domestication is a gradual process, so there is no precise moment in the history of a given species when it can be considered to have become fully domesticated. Zooarchaeology has identified three classes of animal domesticates: Pets (dogs, cats, ferrets, hamsters, etc.) Livestock (cattle, sheep, pigs, goats, etc.)