|
Western Meadowhawk
The Western Meadowhawk (''Sympetrum occidentale'') is a dragonfly of the family Libellulidae, native to western North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car .... In adult form, the Meadowhawk has a length of 1 1/4 to 1 5/8 inches (31 to 40 mm). The key distinguishing feature is a cloudy, orange-brown band that covers the inner half of each wing. The band may appear darker towards the outside. Males have a yellowish thorax, marked with wavy black lines on each side, and a red to reddish brown abdomen, marked with black along the bottom edge of each side. Females are olive to golden brown and marked similarly. References * Libellulidae Insects described in 1915 {{dragonfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympetrum Occidentale
The Western Meadowhawk (''Sympetrum occidentale'') is a dragonfly of the family Libellulidae, native to western North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car .... In adult form, the Meadowhawk has a length of 1 1/4 to 1 5/8 inches (31 to 40 mm). The key distinguishing feature is a cloudy, orange-brown band that covers the inner half of each wing. The band may appear darker towards the outside. Males have a yellowish thorax, marked with wavy black lines on each side, and a red to reddish brown abdomen, marked with black along the bottom edge of each side. Females are olive to golden brown and marked similarly. References * Libellulidae Insects described in 1915 {{dragonfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleksandr Nikolaevich Bartenev
Aleksandr Nikolaevich Bartenev (russian: Александр Николаевич Бартенев; 1882 — 1946) was a zoologist, professor, Doctor of Biological Sciences, and Rector of Rostov University in 1920—1921. He was active in the Russian Empire and later the Soviet Union. Biography Aleksandr Nikolaevich Bartenev was born in 1882. He graduated from the Imperial University of Moscow in 1907. In 1911 he became a Professor at the Department of Zoology of the Imperial University of Warsaw (and after the evacuation of the University in Rostov-on-Don in 1915, became the base of Rostov University, where Bartenev worked until 1930. He was Rector of Rostov University in 1920—1921. In 1934—1936 and in 1939—1945 he also was the head of the Department of Zoology at the Kazakh State University in Almaty and one of the founders of this University. For 40 years (since 1907) of his scientific work Bartenev had published 83 works on fauna, taxonomy, ecology and geographical di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dragonfly
A dragonfly is a flying insect belonging to the infraorder Anisoptera below the order Odonata. About 3,000 extant species of true dragonfly are known. Most are tropical, with fewer species in temperate regions. Loss of wetland habitat threatens dragonfly populations around the world. Adult dragonflies are characterized by a pair of large, multifaceted compound eyes, two pairs of strong, transparent wings, sometimes with coloured patches, and an elongated body. Many dragonflies have brilliant iridescent or metallic colours produced by structural colouration, making them conspicuous in flight. An adult dragonfly's compound eyes have nearly 24,000 ommatidia each. Dragonflies can be mistaken for the closely related damselflies, which make up the other odonatan infraorder ( Zygoptera) and are similar in body plan though usually lighter in build; however, the wings of most dragonflies are held flat and away from the body, while damselflies hold their wings folded at rest, along or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libellulidae
The skimmers or perchers and their relatives form the Libellulidae, the largest dragonfly family in the world. It is sometimes considered to contain the Corduliidae as the subfamily Corduliinae and the Macromiidae as the subfamily Macromiinae. Even if these are excluded (as Silsby does), there remains a family of over 1000 species. With nearly worldwide distribution, these are almost certainly the most often seen of all dragonflies. The genus ''Libellula'' is mostly New World, but also has one of the few endangered odonates from Japan: ''Libellula angelina''. Many of the members of this genus are brightly colored or have banded wings. The related genus ''Plathemis'' includes the whitetails. The genus ''Celithemis'' contains several brightly marked species in the southern United States. Members of the genus ''Sympetrum'' are called darters (or meadowhawks in North America) and are found throughout most of the world, except Australia. Several Southern Hemisphere species in the gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean. Because it is on the North American Plate, North American Tectonic Plate, Greenland is included as a part of North America geographically. North America covers an area of about , about 16.5% of Earth's land area and about 4.8% of its total surface. North America is the third-largest continent by area, following Asia and Africa, and the list of continents and continental subregions by population, fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 579 million people in List of sovereign states and dependent territories in North America, 23 independent states, or about 7.5% of the world's population. In Americas (terminology)#Human ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> North America")