施工実績
Each other men and women incubate the latest eggs for approximately 22 weeks, and more mature young help offer and you may enhance the brand new children
2022.10.30Geographical variation: The fresh Australian coot (Fulica atra australis) away from Australian continent, Brand new Guinea and you will The Zealand try a subspecies of your Eurasian coot, that is prevalent when you look at the Europe, North Africa and China.
- Species Suggestions
- Reproduction and you can environment
This new Australian coot was an intelligent, dark-grey, duck-eg waterbird, instantly recognisable from the white colored statement and you may frontal secure. Coots try associated with gallinules – this new part of one’s railway household members that includes pukeko and you will takahe. Outside of the liquid, a beneficial coot’s posture is more like a small pukeko than simply a great duck. But rather of one’s pukeko’s long narrow toes, coots have broad fleshy lobes on the brief toes, always offer propulsion when diving. New Australian coot is a recently available coming in the The brand new Zealand, basic recorded breeding here in 1958. Its colonisation partly fills the subject kept unused by extinction of New Zealand coot, that has been widespread till the arrival of Maori.
Adult Australian coots are completely record-gray that have a light bill and front secure. He has purple attention and enormous gray ft which have lobed toes. Juvenile and you will teenage wild birds provides duller and you can paler colouring, with soft grey on mouth and you will throat. He has got brown attention and you can faster front protects. Coots was hardly present in trip, where it vary from scaup in that their foot trail trailing their tails in flight.
Similar species: New Zealand scaup possess comparable human body size, profile, colouration and dive conduct, however, disagree within the that have a blue-gray statement no frontal secure, along with men have a red-colored eyes, and lady usually have white around the bill legs (cf. blackish facial feathers for the coots).
Coots achieved The fresh new Zealand to your of a lot occasions in advance of it founded, that have about 9 info about Southern area Isle ranging from 1875 (Lovells Flat, Otago) and 1957 (Heathcote River, Christchurch), before the first eggs and you will chicks had been viewed during the River Hayes for the November 1958
Australian coots are located throughout the mainland The newest Zealand aside from Northland, but you’ll find few areas where he could be abundant. Coots are completely marine, so there try higher places that do not possess the common freshwater ponds and you will ponds having submerged vegetation and you can reedy, grassy islands otherwise edges.
Unmarried coots, even the exact same bird, possess took place just like the vagrants towards Stewart https://hookupreviews.net/bbw-hookup/ Island (). Coots have reached Macquarie Area Isle twice, which have at least seven birds in may-Oct 1957, and another inside June-Oct 1975.
The fresh Australian coot is actually an effective subspecies of your Eurasian coot one to self-lead to your The newest Zealand of Australia regarding twentieth 100 years, and was initially submitted reproduction in The newest Zealand on River Hayes, Otago in the 1958. There had been throughout the dos,000 coots estimated becoming contained in The fresh Zealand during the 2005.
The original Northern Area list was at Lake Tutira, Hawkes Bay for the 1954. There’s an increase out-of coots within the or before 1957, and so they rapidly centered since the a reproduction kinds.
Just like the a self-brought types, Australian coots try automatically included in brand new Wildlife Act, and therefore are totally safe. He is really-established in The latest Zealand, and no accepted threats.
The fresh new Australian coot breeds between September and February and that’s extremely territorial during this period. They breed since the monogamous sets, have a tendency to increasing dos broods a year. Three to 5 egg, cream having dark spots, is actually applied when you look at the a floating colony away from twigs and vegetation anchored to twigs or reeds. All the family classification have a tendency to stays along with her till the 2nd springtime.
Men and women was exactly the same
Coots would be the extremely marine members of the train family, and therefore are quicker enigmatic than just almost every other rail. Although they create graze on the brief yard, it purchase most of their time in water, bobbing their thoughts as they swim and you can to make brief dives immediately after a little forward jump. Whenever worried they find cover certainly one of emergent vegetation toward liquid unlike traveling out. They look to travel reluctantly regarding liquid, pattering along the facial skin with a lot of splashing ahead of fundamentally removing otherwise repaying in another urban area. But not, he or she is strong fliers seem to layer high ranges, always later in the day. This type of routes and you may change away from place don’t appear to be regular. Highest flocks out-of coots get function following reproduction season.