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Biological ornament
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A biological ornament is a characteristic of an animal that appears to serve a decorative function rather than a utilitarian function. Many are secondary sexual characteristics, and others appear on y
The iridescent green color and long tail of the resplendent quetzal (Pharomachrus mocinno) are examples of biological ornamentation.
The iridescent green color and long tail of the resplendent quetzal (Pharomachrus mocinno) are examples of biological ornamentation.
Under the handicap principle, the elaborate tail of the male green peafowl (Pavo muticus) demonstrates its physical fitness, since it can produce the
Under the handicap principle, the elaborate tail of the male green peafowl (Pavo muticus) demonstrates its physical fitness, since it can produce the tail, despite the energetic cost and difficulty of flight and escape it causes.
A male lekking fish, Rutilus sp., displays elaborate colors in its scales
A male lekking fish, Rutilus sp., displays elaborate colors in its scales
A male stag red deer (Cervus elaphus) with bulky antlers used as weapons
A male stag red deer (Cervus elaphus) with bulky antlers used as weapons
Amotz Zahavi
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Amotz Zahavi was an Israeli evolutionary biologist, a Professor in the Department of Zoology at Tel Aviv University, and one of the founders of the Society for the Protection of Nature in Israel. His
Amotz Zahavi in 2005
Amotz Zahavi in 2005
Zahavi with wild Arabian babblers, whose social behavior he studied
Zahavi with wild Arabian babblers, whose social behavior he studied