2023-10-01 01:31:20
Introduction
Aeshnidae Classification Kingdom Animalia Phylum Arthropoda Subembr. Hexapoda Class Insecta Subclass Pterygota Infraclass Palaeoptera Order Odonata Suborder Anisoptera Family Aeshnidae
Rambur, 1842
The Aeshnidae form a family of dragonflies, most often large, reaching a wingspan of up to 11 cm. anax emperor. The bodies of these dragonflies are often decorated in bright colors.
Migrations
We suspected that many species of dragonflies were migratory, but without knowing over what distances or what routes. A team bringing together Princeton University and Rutgers recently showed that dragonflies migrate much like birds. We still do not know their itineraries, but by following (by car and/or plane) for up to 12 days 14 dragonflies of the species (In the life sciences, the species (from the Latin species, “type”)… ) Anax junius (June Anax) captured in New Jersey (Jersey is the largest of the Channel Islands, the capital of which is Saint-Helier. Sa…), and equipped with miniaturized radio transmitters, we have shown that they migrated a bit like birds (towards the south (South is a cardinal point, opposite the north.) of the USA in autumn), some making the journey (A journey is a movement made towards a point more or less distant for personal purposes…) of the North-East of the country (Country comes from the Latin pagus which designated a territorial and tribal subdivision of extent…) to Florida at an average speed (The average is a statistical measure characterizing the elements of a set of…) of 12 km per day (The day or day is the interval between sunrise and sunset; it’s the…) (up to 100 miles/day). They are places of rest, and like birds, they fly whatever the direction of the wind (The wind is the movement of an atmosphere, a mass of gas located on the surface…), by day (The day or the day is the interval which separates sunrise from sunset; it is the…), but arises when the wind speed exceeds 25 km/h per weather (Time is a concept developed by being human to understand the…) rainy. It would be the temperature (Temperature is a physical quantity measured using a thermometer and…) which pushes them; they only seem to take off following two cold nights in succession.
Dragonflies being supposed to have appeared around 285 million years ago (almost 140 million years before birds) perhaps they were pioneers in matter (Matter is the substance which makes up any body having a tangible reality . Its…) of aerial migration.
List of genres
Selon ITIS:
genre Aeshna Fabricius, 1775 genre Allopetalia Selys, 1873 genre Anax Leach, 1815 genre Andaeschna De Marmels, 1994 genre Basiaeschna Selys, 1883 genre Boyeria McLachlan, 1895 genre Castoraeschna Calvert, 1952 genre Coryphaeschna Williamson, 1903 genre Epiaeschna Hagen, 1877 genre Gomphaeschna Selys, 1871 genre Gynacantha Rambur, 1842 genre Limnetron Förster, 1907 genre Nasiaeschna Selys in Förster, 1900 genre Neuraeschna Hagen, 1867 genre Oplonaeschna Selys, 1883 genre Racenaeschna Calvert, 1958 genre Remartinia Navás, 1911 genre Rhionaeschna Foerster, 1909 genre Staurophlebia Brauer, 1865 genre Triacanthagyna Selys, 1883
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#Aeshnidae #Definition #Explanations
