British Dragonflies 1
نویسندگان
چکیده
منابع مشابه
Evolution of Dragonflies
All life began from a common ancestor. According to most scientists, animal life is thought to have evolved from a flagellated protist. This protist evolved by a cellular membrane folding inward, which became the first digestive system in the Animalia kingdom (Campbell, Reece &, Mitchell, 1999). As time went on, the animalia kingdom became more diversified and the class Arthropoda arose. Arthro...
متن کاملOviposition Behavior in Two Species of Dragonflies
A comparative study of oviposition behavior of the dragonflies, Anax junius and Tramea onusta, was undertaken for two successive years in Tinley Park, Illinois. It was found that females of both species use tandem position and oviposit in close association with males. In A. junius, however, the male is physically attached to (tandem with) the ovipositing female during the actual act of oviposit...
متن کاملBritish Machine Vision Conference 1
Accurate registration of surfaces is a common problem in computer vision. Several algorithms exist to reene an approximate value for the pose to an accurate value. They are all more or less variants of the Iterated Closest Point algorithm of Besl and McKay (1992). Up to now the problem of determining the uncertainty in the pose estimate thus obtained has not been addressed in detail. In this pa...
متن کاملFlight of the dragonflies and damselflies
This work is a synthesis of our current understanding of the mechanics, aerodynamics and visually mediated control of dragonfly and damselfly flight, with the addition of new experimental and computational data in several key areas. These are: the diversity of dragonfly wing morphologies, the aerodynamics of gliding flight, force generation in flapping flight, aerodynamic efficiency, comparativ...
متن کاملRedox alters yellow dragonflies into red.
Body color change associated with sexual maturation--so-called nuptial coloration--is commonly found in diverse vertebrates and invertebrates, and plays important roles for their reproductive success. In some dragonflies, whereas females and young males are yellowish in color, aged males turn vivid red upon sexual maturation. The male-specific coloration plays pivotal roles in, for example, mat...
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ژورنال
عنوان ژورنال: Nature
سال: 1900
ISSN: 0028-0836,1476-4687
DOI: 10.1038/061418a0