Download Dragonflies Magnificent Creatures of Water, Air, and Land by Pieter van Dokkum PDF

By Pieter van Dokkum

Dragonflies: superb Creatures of Water, Air, and Land
Almost with no our noticing, dragonflies dart via our international, flying, seeing, searching, mating. Their lives are as mysterious as their gossamer wings are appealing. during this e-book Pieter van Dokkum finds some of the dragonfly’s secrets and techniques, shooting the levels of this outstanding insect’s lifestyles cycle in unparalleled close-up photographs.
He records scenes of dragonfly job seldom witnessed and infrequently photographed.
The ebook starts on a moonlit summer season evening, whilst an alien-looking
larva crawls out of the water and transforms right into a totally shaped dragonfly. within the following chapters we witness dew-covered dragonflies gleaming within the morning solar, then a couple of mating dragonflies relocating throughout the air in a twelve-legged, eight-winged dance. within the ultimate bankruptcy, one iteration dies because the subsequent prepares to go away the water and start its personal winged journey.
Each degree is documented via van Dokkum’s inquisitive lens and observed by way of info on a number of species of dragonflies and damselflies, their metamorphosis, and their ecological significance as insect predators.

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The head is mostly used for seeing and eating, the thorax for movement, and the abdomen for breathing, processing food, and reproduction. Dragonflies and damselflies are both members of the order Odonata, or “toothed ones,” referring to their tooth-like mandibles. They have a similar body plan, but there are some important differences. Dragonflies are generally larger and stockier than damselflies. While resting, their wings remain spread, whereas many damselfly species hold them over their backs.

Like all insects, dragonflies and damselflies have an external skeleton and six legs arranged in three pairs. Their bodies are composed of three parts: the head, which is dominated by a pair of huge eyes; the thorax, the power center to which the legs and two pairs of wings are attached; and the abdomen, which can bend, as it is made up of ten segments. The head is mostly used for seeing and eating, the thorax for movement, and the abdomen for breathing, processing food, and reproduction. Dragonflies and damselflies are both members of the order Odonata, or “toothed ones,” referring to their tooth-like mandibles.

Blue Dasher (m) 46 a n e x c e l l e n t d e s i g n Thermoregulation. Dragonflies regulate their body temperature by angling their bodies to maximize or minimize the area exposed to the sun. When temperatures are high around midday, perching dragonflies such as this Halloween Pennant may point their abdomen straight up, to absorb as little heat as possible (“obelisking”). a n e x c e l l e n t d e s i g n 47 ­ Breathing. The bodies of dragonflies contain a branching network of tubes, through which air is pumped.

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