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Ormia ochracea is a small yellow nocturnal fly in the family Tachinidae. [2] It is notable for its parasitism of crickets and its exceptionally acute directional hearing. The female is attracted to the song of the male cricket and deposits larvae on or around him, as was discovered in 1975 by the zoologist William H. Cade.
The females do not lay their eggs all at once, they do this periodically over several weeks. [9] Females can lay up to 200 eggs over two or three months. Each set of eggs is placed in a different location. The female can lay one egg or up to six eggs in a group. Weta "eggs are about 6mm long and 1.5mm thick".
The peak frequency of the sagebrush cricket is at 12.7 kHz and has a sound level between 100.5 and 101.0 dB. Unlike other Orthoptera , sagebrush crickets can sing at low temperatures and have been found to sing at temperatures of -8 degrees Celsius whereas others minimum temperatures are 7 degrees Celsius.
Wētā is a loanword, from the Māori-language word wētā, which refers to this whole group of large insects; some types of wētā have a specific Māori name. [2] In New Zealand English, it is spelled either "weta" or "wētā", although the form with macrons is increasingly common in formal writing, as the Māori word weta (without macrons) instead means "filth or excrement". [3]
Most crickets lay their eggs in the soil or inside the stems of plants, and to do this, female crickets have a long, needle-like or sabre-like egg-laying organ called an ovipositor. Some ground-dwelling species have dispensed with this, either depositing their eggs in an underground chamber or pushing them into the wall of a burrow. [1]
Broody hens can be recognized by their behaviour. They sit firmly over the eggs, and when people approach or try to remove the eggs, threaten the person by erecting their feathers, emitting a characteristic sound like clo-clo-clo and will peck aggressively. When broody, hens often temporarily cease eating or reduce their feed consumption.
The risk of humans becoming infected by eating eggs from poultry with H5N1 is low, the FDA says, and there are safeguards in place to identify infected poultry and remove their eggs from the market.
Mole crickets are the only insects that construct a sound-producing apparatus. Given the known sensitivity of a cricket's hearing (60 decibels), a night-flying G. vineae female should be able to detect the male's song at a range of 30 m; this compares to about 5 m for a typical Gryllus cricket that does not construct a burrow. [14]