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Damselfly grooming Water mites parasitizing Pseudagrion decorum. Damselflies have a variety of internal and external parasites. Particularly prevalent are the gregarine protozoans found in the gut. In a study of the European common blue damselfly, every adult insect was infected at the height of the flying season.
Enallagma cyathigerum (common blue damselfly or common bluet) is a species found mainly between latitudes 40°N and 72°N; [2] It is widely distributed in the Palearctic, common in all European countries (including Portugal, Spain, France, Great Britain, Ireland, Germany, Sweden, Norway, Finland, Poland, etc.) and in Asia in Turkey, Iran, Russia, and South Korea. [1]
Young adult female. This is a small to medium size damselfly (length up to 46 mm (1.8 in), wingspan up to 53 mm (2.1 in)). [3] The eyes are greenish with a dark grey cap. [4] As is the case in many damselflies, this species shows strong sexual dimorphism.
Damselfly nymphs have a different food source within the freshwater streams as opposed to on land and in the air, including tadpoles, aquatic invertebrates, small fish and other damselfly nymphs. [19] Although similar to the adult damselfly, the prey is dependent on the individual’s size and only consists of smaller species. [12]
Ischnura verticalis can reach a body length of 22–30 millimetres (0.87–1.18 in). [5] These small green, black and blue damselflies have a slender body with four wings folding over the back.
This species of damselfly and bullfrogs both prefer habitats in calm water. Adult bullfrogs, and some tadpoles, feed on larvae and adult damselflies. Humans introduced another species of frog, Coqui frogs (Eleutherodactylus coqui) to the Hawaiian Islands in the 1980s. It is incredibly invasive and could begin to disrupt Pacific Hawaiian ...
Adult damselflies have a slender body and fold their wings parallel to the body when at rest. Compared to other damselfly species, the flying earwig Hawaiian damselfly is relatively larger and more elongated. [2] Adults are usually 46–50 mm (1.8-1.9 in) in length. Their wingspan reaches 50–53 mm (1.9-2.1 in). Males are blue and black.
This damselfly is active between March and November, and adults are known to live over 30 days, a relatively long adult life for damselflies. This species occurs in coastal regions of the Bay Area; it is thought that its long life and long flight season are adaptations to the foggy climate of the region. [3]