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An American black duck (upper left) and a male mallard (lower right) in eclipse plumage [25]: 506 Two months after hatching, the fledgling period has ended, and the duckling is now a juvenile. [34] The duckling is able to fly 50–60 days after hatching.
The northern pintail broadly overlaps in size with the similarly widespread mallard, but is more slender, elongated and gracile, with a relatively longer neck and (in males) a longer tail. The unmistakable breeding plumaged male has a chocolate-brown head and white breast with a white stripe extending up the side of the neck. Its upperparts and ...
A male mallard. The speculum feathers are bright blue with white edges. The speculum is a patch, often distinctly coloured, on the secondary wing feathers, or remiges, of some birds. Examples of the colour(s) of the speculum in a number of ducks are: Common teal and green-winged teal: Iridescent green edged with buff. [1]
A mallard found last month in Orange County with an arrow piercing its neck and cheek has made a full recovery and was released back into the ... or male, mallard was cleared this week to leave, ...
Juvenile male chimpanzees have been recorded mounting and copulating with immature chimps. Infants in bonobo societies are often involved in sexual behaviour. [78] Immature male bonobos have been recorded initiating genital play with both adolescent and mature female bonobos.
Male mallard in mid-flight at Birds of North American boreal forests, by Alan D. Wilson Northern gannets , by Alan D. Wilson Female mallard and ducklings at Burnaby Lake Regional Park , by Alan D. Wilson
A jealous male might chase another away from a female, after which the two males reunite and engage in scrotal rubbing. Or after a female hits a juvenile, the latter's mother may lunge at the aggressor, an action that is immediately followed by genital rubbing between the two adults. [103]
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