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Homosexual behaviour is demonstrated by 120 known species of birds. [40] While an uptick in research on bird homosexuality – and animal homosexuality in general – has been coming out in recent years, it is common for some authors to labour in articulating the view any root cause or function of bird homosexuality is poorly understood.
Properties of binary relations (4 C, 22 P) Pages in category "Binary relations" The following 26 pages are in this category, out of 26 total.
Animal sexual behavior takes many different forms, even within the same species and the motivations for and implications of their behaviors have yet to be fully understood. Bagemihl's research shows that homosexual behavior, not necessarily sexual activity, has been documented in about 500 species as of 1999, ranging from primates to gut worms .
Its use in animal studies has been controversial for two main reasons: animal sexuality and motivating factors have been and remain poorly understood, and the term has strong cultural implications in western society that are irrelevant for species other than humans. [12] Thus homosexual behavior has been given a number of terms over the years.
Transgender people have a unique place in relation to the gender binary. In some cases, attempting to conform to societal expectations for their gender, transgender individuals may opt for surgery, hormones, or both. [35] Ball culture is an example of how the LGBT community interprets and rejects the gender binary.
This section briefly reviews three main findings about the evolution of monogamy in animals. The amount of social monogamy in animals varies across taxa, with over 90% of birds engaging in social monogamy while only 3–9% of mammals are known to do the same. [6] [29] [30] This list is not complete.
It encodes the common concept of relation: an element is related to an element , if and only if the pair (,) belongs to the set of ordered pairs that defines the binary relation. An example of a binary relation is the "divides" relation over the set of prime numbers and the set of integers, in which each prime is related to each integer that is ...
Other animal activities may be misinterpreted due to the frequency and context in which animals perform the behaviour. For example, domestic ruminants display behaviours such as mounting and head-butting. This often occurs when the animals are establishing dominance relationships and are not necessarily sexually motivated.