DRAGONFLY Nature Ornaments Niobium 1 Oz Moneda Plata 20$ Canada 2017

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This beautiful Silver coin is the first issue in the new series “Nature’s Ornaments” that celebrates the nature’s spectrum of colors and features a uniquely shaped niobium embellishment, which offers an artistic representation of an iridescent dragonfly. The coin has a Proof quality and will be shipped in a standard case, with Certificate of Authenticity. Limited mintage to 6.000 pcs worldwide.

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109.95 €

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Específicas
País Canadá
Año 2017
Valor Facial 20 Dólares
Metal Plata
Finura 999/1000
Peso (g) 31.39
Diámetro (mm) 38
Calidad Proof
Tirada (uds) 6.000
Certificado de Autenticidad
Caja
 
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Dragonfly
The ancestors of the Dragon Fly lived on the Earth approximately 250 million years ago and with a wingspan of over 70 cm were huge. About 5‘700 species are known today. The Dragon Fly (lat. Odonata) has unique flying characteristics. Due to its two pairs of wings, which are able to manoeuvre independently, the Dragon Fly is capable of changing its direction very fast and can stall remain stationary in the air like a helicopter. It can reach a speed of up to 50 km/h. The Dragon Flies’s head is somewhat out of line with the body and is therefore very agile. It is characterized by large multifaceted eyes, two pairs of strong transparent wings, and an elongated body. Dragonflies are similar to damselflies, but the adults can be differentiated by the fact that the wings of most dragonflies are held away from, and perpendicular to, the body when at rest.
Dragonflies possess six legs (like any other insect), but most of them cannot walk well. Dragonflies are valuable predators that eat mosquitoes, and other small insects like flies, bees, ants, and butterflies. They are usually found around lakes, ponds, streams and wetlands because their larvae, known as "nymphs", are aquatic. Many Odanata species only live for a few weeks. From the view point of humans, the Dragon Fly is very useful because it eats masses of mosquitoes and other vermin. It doesn’t even spare its fellow species. Unfortunately, due to climate warming and the threat of their living environment, many Dragon Fly species are jeopardised and critically endangered.

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