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Extra-pair copulation in men has been explained as being partly due to parental investment. [7] Research has suggested 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. [7]
Slower song rate is associated with age and is preferred by females. Reproductive status of the individual is communicated through higher maximum frequency. There was also positive correlation between age and extra-pair copulation frequency. [5] Bird calls are also known to continue after pair formation in several socially monogamous bird
Furthermore, it has been proposed that birds that nest in high densities, as seabirds do in breeding colonies, have higher rates of EPCs and EPFs than birds that do not nest colonially. [46] Despite this, Westneat and Sherman (1997) [ 49 ] found no significant correlation between nesting density and EPFs in a meta-analysis.
The bird of paradise mating dance is a combination of color, movement, and sound so let’s look at each in more detail. These birds can be almost any color but the individuals in the above clip ...
They are the only bird species that mates face to face, [11] in comparison to the more conventional copulation style for birds where the male mounts the female's back. [12] Stitchbird have some of the highest levels of extra-pair paternity of any bird with up to 79% of the chicks in the nest sired by other males, possibly as a result of forced ...
Polygyny (/ p ə ˈ l ɪ dʒ ɪ n i /; from Neo-Greek πολυγυνία, from πολύ-(polú-) ' many ' and γυνή (gunḗ) ' woman, wife ') [1] is a mating system in which one male lives and mates with multiple females but each female only mates with a single male.
More than 150 million poultry birds have been killed across the U.S. since 2022, part of an effort to limit the spread of H5N1 bird flu, outbreaks of which have been identified in both commercial ...
A major solar power plant project that was granted over a billion dollars in federal loans is on the road to closure, with energy experts blasting the project as a "boondoggle" that harmed the ...