Search results
Results from the WOW.Com Content Network
Corydalus is a genus of large flying insects in the Corydalidae family, commonly known as dobsonflies.They are endemic to North, Central and South America and there are about 35 known species.
Eastern Dobsonfly (Corydalus cornutus) female. The adult dobsonfly is a large insect up to 140 millimetres long with a wingspan of up to 125 millimetres. [8] The female has short powerful mandibles of a similar size to those of the larva while the mandibles of the male are sickle-shaped and up to 40 millimetres long, half as long as the body. [1]
The eastern dobsonfly, Corydalus cornutus, is the most well-known North American species among the dobsonflies. These genera have distinctive elongated mandibles in males and form the subfamily Corydalinae. The genera in which the males have normal mandibles, called fishflies, form the subfamily Chauliodinae.
The origin of the word "dobsonfly" is unclear. John Henry Comstock used the term in reference to these insects in his 1897 book Insect Life, [1] but did not explain it. He also mentioned that anglers used the word "hellgrammite" for the aquatic larvae they used as bait, but the origin of this term is also unknown.
Archichauliodes diversus is the only member of the genus (and family) found in New Zealand where it is endemic and common throughout both the North and South Islands. [4] [5] It is common in streams nationwide, with moderate to good water quality, and has tolerance values of 7 (hard bottom sites) and 7.3 (soft bottom sites).
The life cycle of the monarch butterfly Like all Lepidoptera, monarchs undergo complete metamorphosis ; their life cycle has four phases: egg, larva, pupa, and adult. Monarchs transition from eggs to adults during warm summer temperatures in as little as 25 days, extending to as many as seven weeks during cool spring conditions.
Brachycera are ecologically very diverse, with many being predatory at the larval stage and some being parasitic. Animals parasitised include molluscs, woodlice, millipedes, insects, mammals, [19] and amphibians. [23] Flies are the second largest group of pollinators after the Hymenoptera (bees, wasps and relatives).
An eastern pondhawk in the Mallows Bay–Potomac River National Marine Sanctuary.. Nymphs of the eastern pondhawk are identifiable by their green eyes. When they leave the water and moult for the final time, the emerging immature adult is dull olive green but over the course of a few hours, the abdomen becomes bright green, there is dark brown banding and the heads take on a metallic green sheen.