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Oystercatcher chicks and eggs. Nearly all species of oystercatcher are monogamous, although there are reports of polygamy in the Eurasian oystercatcher. They are territorial during the breeding season (with a few species defending territories year round). There is strong mate and site fidelity in the species that have been studied, with one ...
A chart pattern or price pattern is a pattern within a chart when prices are graphed. In stock and commodity markets trading, chart pattern studies play a large role during technical analysis. When data is plotted there is usually a pattern which naturally occurs and repeats over a period. Chart patterns are used as either reversal or ...
The variable oystercatcher has issues with disturbance from human activity which damages nests. [11] Habitat loss such as decreasing coastal dunes that provide essential breeding locations for the species are likely to have a large impact on all populations. Fishing nets and oil spills also pose threatening for the species. [8]
The Eurasian oystercatcher (Haematopus ostralegus) also known as the common pied oystercatcher, or (in Europe) just oystercatcher, is a wader in the oystercatcher bird family Haematopodidae. It has striking black and white plumage, a long straight orange-red bill, red eyes and relatively short dull pink legs.
A mating system is a way in which a group is structured in relation to sexual behaviour. The precise meaning depends upon the context. With respect to animals, the term describes which males and females mate under which circumstances.
The American oystercatcher (Haematopus palliatus), occasionally called the American pied oystercatcher, is a member of family Haematopodidae. Originally called the "sea pie", it was renamed in 1731 when naturalist Mark Catesby claimed that he had observed the bird eating oysters. [ 2 ]
Extra-pair copulation in men has been explained as being partly due to parental investment. [7] Research has suggested [7] that copulation poses more of a risk to future investment for women, as they have the potential of becoming pregnant, and consequently require a large parental investment of the gestation period, and then further rearing of the offspring.
The blackish oystercatcher is native to the coasts of Argentina, Chile, the Falkland Islands and Peru, and it is a vagrant to Uruguay. [1] Its natural habitats are rocky shores. It feeds in the intertidal zone on rocky shorelines, in rockpools and on pebble beaches. Rarely, it can be found on sandy beaches hunting for mole crabs. [3]