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Brennan, P. Clutch predation in great tinamous Tinamus major and implications for the evolution of egg color. Porphyrins produce uniquely ephemeral animal colouration: a possible signal of virginity. Zhao, R. Eggs normally get their hue from a naturally-occurring chemical pigment that gives them a flat color. Underneath their iridescent coating, tinamou's eggs are a regular old shade of blue. The tinamous' place on the evolutionary tree offers a glimpse into the origins of flightlessness.
All ratites, including tinamous, probably trace their ancestry back to a flying relative, according to Baker. Tinamous retained their ability to fly , while the other lineages each lost flight independently. Robin's egg blue: eggs of the American robin Turdus migratorius. Blue-green eggshell pigments The camouflage provided by dull, mottled eggshells is, of course, the most important factor driving the evolution of eggshell colors and patterns, especially for birds that nest on, or close to, the ground.
Sadly, there is no chicken breed that lays truly purple eggs. If your eggs look purple, it's the bloom to blame. The bloom is a protective layer on the outside of the gg that helps prevent bacteria from entering the shell. It also helps the eggs stay fresh. The greater bird-of-paradise has uniquely colored plumage. Wilson's bird-of-paradise. Splendid Fairy Wren. Indian Peafowl. Lilac-breasted Roller. Red-bearded Bee Eater. Lady Gouldian Finch. Tinamou, order Tinamiformes , any of about 47 species of ground-dwelling birds found in Central and South America.
Tinamous superficially resemble partridges and quail but have limited flight capability, preferring to walk or run rather than fly. Most inhabit forests, but some live in more open terrain.
From one clutch to another, the eggs vary in colour from buffy to greenish or bluish, spotted and blotched with brown. Incubation of the eggs lasts from 16 to 18 days. Ratites include some of the world's largest birds — ostriches, emu and the now extinct New Zealand moa — as well as cassowaries, rheas and tinamous.
Male tinamous are in charge of egg incubation, incubating almost uninterruptedly, and take care of the precocial offspring. After monitoring the nests through video cameras and egg-exchange experiments to collect DNA, Brennan found that there was a significantly higher risk of predation during incubation than during egg laying. This suggests that rather than using the egg cues i. High levels of nest attendance from male tinamous could possibly lead to a reduced selection for egg camouflage, thus allowing this particular trait to evolve over time and perhaps making it worthy for other functions.
Want to know more about tinamous? Brennan, P. Clutch predation in great tinamous Tinamus major and implications for the evolution of egg color. Journal of Avian Biology Cabot, J. Family Tinamidae tinamous. Sargatal Eds. Handbook of the birds of the world. Volume 1: Ostrich to ducks. Lynx Edicions, Barcelona, Spain.
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