Search results
Results from the WOW.Com Content Network
Ephemera danica can reach an imago size of 15–20 mm (0.6–0.8 in) in males, while females are larger, reaching 16–25 mm (0.6–1.0 in). This mayfly, with its characteristic markings and three tails (), is the most commonly seen of British Ephemeridae.
This mayfly related article is a stub. You can help Wikipedia by expanding it.
They breed in a wide range of waters, usually requiring a layer of silt as the nymphs have strong legs which are adapted for burrowing (the group is sometimes known as burrowing mayflies). The nymphs are largely carnivorous and collect their food either through predation or scavenging. Ephemera simulans male
The mayfly has come to symbolise the transitoriness and brevity of life. [74] The English poet George Crabbe, known to have been interested in insects, [75] compared the brief life of a newspaper with that of mayflies, both being known as "Ephemera", [76] things that live for a day: [77]
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
Ephemera vulgata is found throughout most of Europe. It mostly breeds in sluggish rivers and still waters such as ponds. It mostly breeds in sluggish rivers and still waters such as ponds. This species is in decline, probably because of pollution of waterways by pesticides and heavy metals, and because the adult insects are disorientated by ...
A stereoscopic rangefinder or stereoscopic telemeter [1] is an optical device that measures distance from the observer to a target, using the observer's capability of binocular vision. It looks similar to a coincidence rangefinder , which uses different principles and has only one eyepiece.
A long-range laser rangefinder is capable of measuring distance up to 20 km; mounted on a tripod with an angular mount. The resulting system also provides azimuth and elevation measurements. A laser rangefinder, also known as a laser telemeter, is a rangefinder that uses a laser beam to determine the distance to an object.