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They are unique among insects in that they moult one more time after acquiring functional wings; [13] this last-but-one winged instar usually lives a very short time and is known as a subimago, or to fly fishermen as a dun. Mayflies at the subimago stage are a favourite food of many fish, and many fishing flies are modelled to resemble them ...
Most male fish have two testes of similar size. In the case of sharks, the testes on the right side is usually larger [citation needed].The primitive jawless fish have only a single testis, located in the midline of the body, although even this forms from the fusion of paired structures in the embryo.
This leads to flies having more reproduction abilities than most insects, and much quicker. Flies occur in large populations due to their ability to mate effectively and quickly during the mating season. [35] More primitive groups mates in the air during swarming, but most of the more advanced species with a 360° torsion mate on a substrate. [73]
The pair flies in tandem with the male in front, typically perching on a twig or plant stem. The female then curls her abdomen downwards and forwards under her body to pick up the sperm from the male's secondary genitalia, while the male uses his "tail" claspers to grip the female behind the head: this distinctive posture is called the "heart ...
Fishflies are members of the subfamily Chauliodinae, belonging to the megalopteran family Corydalidae. [1] They are most easily distinguished from their closest relatives, dobsonflies, by the jaws (mandibles) and antennae.
The housefly (Musca domestica) is a fly of the suborder Cyclorrhapha.It possibly originated in the Middle East, and spread around the world as a commensal of humans.Adults are gray to black, with four dark, longitudinal lines on the thorax, slightly hairy bodies, and a single pair of membranous wings.
Blue-winged Olive flies is a collective term used by anglers in fly fishing to identify a broad array of mayflies having olive, olive-brown bodies and bluish wings in their adult form. Sometimes referred to as BWO , a wide array of artificial flies are tied to imitate adult, nymphal and emerging stages of the aquatic insect.
Flying midges in their adult stage are eaten by fish and insectivorous birds, such as swallows and martins. They are also thought to be an especially important food source for tufted duck chicks during their first few days of life. They also are preyed on by bats and flying predatory insects, such as Odonata and dance flies.