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The Eurasian teal (Anas crecca), common teal, or Eurasian green-winged teal is a common and widespread duck that breeds in temperate Eurosiberia and migrates south in winter. [2] The Eurasian teal is often called simply the teal due to being the only one of these small dabbling ducks in much of its range. [ 3 ]
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While the juvenile survival rate is highly variable year to year, on average 67% of juveniles survive. [2] Highest mortality for the yellow-billed duck occurs in the summer months with December typically having the highest death rate out of any month of the year closely followed by January.
The green-winged teal (Anas carolinensis) or American teal is a common and widespread duck that breeds in the northern areas of North America except on the Aleutian Islands. It was considered conspecific with the Eurasian teal ( A. crecca ) for some time, but the two have since been split into separate species.
From a study completed by J.A. Mills on the morality and status of grey teal in New Zealand, approximate survival rates were established. To establish the rate of survival, the birds were banded. It was recorded that 68% of juveniles die within the first year of life, 77% by their first two years of life and then 85% by the end of their fourth ...
The Eurasian eagle-owl predates the largest members of the most species-rich diurnal raptor genera: the 900 g (2.0 lb) Eurasian goshawks from the genus Accipiter, the 1,375 g (3.031 lb) upland buzzards from the genus Buteo, and the 1,460 g (3.22 lb) gyrfalcons (F. rusticolus) of the genus Falco. [128]
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The common pochard is one of the species protected by the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA). [30] The International Union for Conservation of Nature rates the species as vulnerable. Though it has a huge range and an extremely large population, there is evidence of precipitous declines in several regions.