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The semi-aquatic black swamp snake, Seminatrix pygaea, which lives in an environment where periods of drought are very common, has shown that environmental factors have a negative effect on female snakes whose large size was selected to increase fecundity as these droughts create a unique scenario to test whether survivability or reproductive ...
The snake detection theory, [1] [2] [3] also sometimes called the snake detection hypothesis, suggests that snakes have contributed to the evolution of primates' visual system. According to the theory, predatory pressure from snakes has selected individuals who are better able to recognize them, improving their survival chances and therefore ...
Sexual dimorphism in size has been proposed as an explanation for the widespread nature of sexual cannibalism across distantly related arthropods. Typically, male birds and mammals are larger as they participate in male-male competition. [56] However, in arthropods this size dimorphism ratio is reversed, with females commonly larger than males.
They found that snakes experienced a burst of innovation early in their history and have evolved at a rate perhaps three to five times faster than their lizard cousins.
The hemipenis is the intromittent organ of Squamata, [4] which is the second largest order of vertebrates with over 9,000 species distributed around the world. They differ from the intromittent organs of most other amniotes such as mammals, archosaurs and turtles that have a single genital tubercle, as squamates have the paired genitalia remaining separate. [5]
Animal non-reproductive sexual behavior encompasses sexual activities that non-human animals participate in which do not lead to the reproduction of the species. Although procreation continues to be the primary explanation for sexual behavior in animals, recent observations on animal behavior have given alternative reasons for the engagement in sexual activities by animals. [1]
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Snakes may take to burrowing in holes or caves, under logs or rocks, in tree stumps, or by making their way into basements, crawlspaces, garages, barns, sheds, wood piles and even car engines.