| Tree cricket | |
|---|---|
 | |
| Snowy tree cricket, Oecanthus fultoni | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Orthoptera |
| Suborder: | Ensifera |
| Family: | Oecanthidae |
| Subfamily: | Oecanthinae Blanchard, 1845 [1] |
| Tribes | |
| |
Tree crickets are insects of the order Orthoptera. These crickets belong to the Oecanthinae one of the subfamilies of the recently (2022) restored family Oecanthidae. [2]
Tree crickets as well as most other crickets have two pairs of wings. The fore wings are located closer to the head and are hard and leathery in appearance. The hind wings are located aft of the fore wings and are the wings it uses for flight. When the cricket is not in flight the fore wings fold back to cover the hind wings. The bodies of tree crickets are long and skinny with a coloration that matches their habitat. They have large powerful legs used for jumping. Their heads contain two antennae which can sense both touch and odor and compound eyes which are inherent in all Orthoptera. [3]
They live in trees and shrubs, for which they are well camouflaged. These crickets are nocturnal and can be found on every continent except Antarctica.
In Europe, tree crickets have been expanding northwards and had reached the island of Jersey in the Channel Islands by 2010. In August 2015, the first population was found in mainland England at Dungeness in Kent, where hundreds of males were present. [4]
Three tribes (in two supertribes) are currently (2024) recognised: [2]
Auth.: Blanchard, 1845
Auth.: Vickery & Kevan, 1983
Like other species of cricket they produce their calling song by rubbing the ridges of their wings together. The chirp (or trill) of a tree cricket is long and continuous and can sometimes be mistaken for the call of a cicada or certain species of frogs. While male tree crickets have the ability to call, females lack the ability. [5] This call is then received by other tree crickets in the area through a system called sender-receiver matching. For example, a male tree cricket will produce a mating call at a specific range of frequencies. This allows females to be able to pick out the males mating call without becoming distracted or confused by other calls from other species of insects. This range of frequencies is called a carrier frequency. Tree crickets are unique in the way they use carrier frequencies because the range of frequencies changes according to the temperature. Due to this, female tree crickets have tympanum (hearing organs) that can receive a much wider range of frequencies than most other insects. [6] Female tree crickets seem to prefer calls at the lower range of frequencies indicating the presence of a large male. This preference for larger males could be because larger males produce a greater amount of sperm thus increasing the females chances of offspring. Some male tree crickets produce a sound that is too quiet to be audible; they amplify their mating call by making a "megaphone" type structure from tree leaves. [7]
Tree crickets are omnivorous, and are known to feed on plant parts, other insects such as Sternorrhyncha, and even fungi. [8]
Tree crickets exhibit a behavior called courtship feeding. Shortly after copulation the male tree cricket secretes a fluid from the metanotal gland located between its wings in the thoracic cavity. This fluid provides the female with nutrients that help to increase the chances of reproduction. Female tree crickets have even been known to steal this fluid from a mating pair during copulation or finish consuming the fluid if the first female dismounts and leaves. After mating a male cannot mate again until after 30 to 60 min allowing the production of another spermatophere. [5] Eggs are laid in the fall, in a series of small holes drilled into the bark. [9] After remaining dormant for the winter, the eggs hatch in the spring and the young tree crickets begin feeding on aphids. They may go through as many as twelve molts before reaching maturity around mid summer.
The snowy tree cricket ( Oecanthus fultoni ) is known for having a chirping rate highly correlated with ambient temperature. This relationship is known as Dolbear's Law.
Insects in the family Tettigoniidae are commonly called katydids or bush crickets. They have previously been known as "long-horned grasshoppers". More than 8,000 species are known. Part of the suborder Ensifera, the Tettigoniidae are the only extant (living) family in the superfamily Tettigonioidea.
Anostostomatidae is a family of insects in the order Orthoptera, widely distributed in the southern hemisphere. It is named Mimnermidae or Henicidae in some taxonomies, and common names include king crickets in Australia and South Africa, and wētā in New Zealand. Prominent members include the Parktown prawn of South Africa, and the giant wētā of New Zealand.
Gryllinae, or field crickets, are a subfamily of insects in the order Orthoptera and the family Gryllidae.
Ensifera is a suborder of insects that includes the various types of crickets and their allies including: true crickets, camel crickets, bush crickets or katydids, grigs, weta and Cooloola monsters. This and the suborder Caelifera make up the order Orthoptera. Ensifera is believed to be a more ancient group than Caelifera, with its origins in the Carboniferous period, the split having occurred at the end of the Permian period. Unlike the Caelifera, the Ensifera contain numerous members that are partially carnivorous, feeding on other insects, as well as plants.
Gryllotalpa major,also known as the prairie mole cricket, is endemic to the United States and is the largest cricket in North America. Its natural habitat is temperate grassland and it belongs to the family Gryllotalpidae. It is threatened by habitat loss, and is currently only found in Oklahoma, Kansas, Missouri, Nebraska and Arkansas. Males of this species produce sounds by rubbing their fore wings together. They sing from special burrows they construct in the prairie soil to attract females for mating, and they can be heard at distances up to 400 m from the burrow. Males aggregate their acoustic burrows in a lek arena and are very sensitive to vibrations carried through the ground. Males communicate with neighboring males through vibrational signals, and the songs they project to flying females are harmonic chirps, rather than the trills produced by most mole crickets.
Crickets are orthopteran insects which are related to bush crickets, and, more distantly, to grasshoppers. In older literature, such as Imms, "crickets" were placed at the family level, but contemporary authorities including Otte now place them in the superfamily Grylloidea. The word has been used in combination to describe more distantly related taxa in the suborder Ensifera, such as king crickets and mole crickets.
Phalangopsinae, occasionally known as spider crickets, are a subfamily of crickets in the family Phalangopsidae. Members of Phalangopsinae are found worldwide in tropical and subtropical regions. Most species in the subfamily are nocturnal and can be found in rocky areas, near fallen wood, and the understory of forests. Some species are gregarious, gathering in large numbers.
Oecanthus pellucens, common name Italian tree cricket, is a species of tree crickets belonging to the family Gryllidae, subfamily Oecanthinae.
Oecanthus fultoni, also known as the snowy tree cricket, or thermometer cricket, is a species of tree cricket from North America. It feeds on leaves but also damages fruit. The chirp of this species is often dubbed onto sound tracks of films and television shows to depict a quiet summer's night. The rate of chirp varies depending on the heat of the environment, allowing a listener to estimate the temperature.
Grylloidea is the superfamily of insects, in the order Orthoptera, known as crickets. It includes the "true crickets", scaly crickets, wood crickets and many other subfamilies, now placed in five extant families; some genera are only known from fossils.
Rohini Balakrishnan is an Indian bioacoustics expert. She is a senior Professor and Chair of the Centre for Ecological Sciences at the Indian Institute of Science (IISc), Bengaluru. Her research focuses on animal behavior through the lens of animal communication and bioacoustics.
Cyphoderris strepitans, the sagebrush cricket or sagebrush grig, is a one of only a few surviving species in the family Prophalangopsidae. Three of these species are in the genus Cyphoderris and all three are endemic to North America. C. strepitans name is from the Latin word 'strepitans' which means 'making a great noise', refers to their calling song during the mating season.
Oecanthus nigricornis is a "common tree cricket" in the subfamily Oecanthinae. A common name for O. nigricornis is black-horned tree cricket. It is found in North America.
Phyllopalpus pulchellus, known generally as the red headed bush cricket,handsome trig or handsome bush cricket, is a species of winged bush cricket in the family Trigonidiidae. It is found in the eastern United States.
Cyphoderris monstrosa, also known as the great grig, is a species of hump-winged grig in the family Prophalangopsidae. Though the fossil record shows at least 90 extinct species from this family, C. monstrosa is one of only 7 known species alive today.
The Phalangopsidae, which includes the "spider crickets" and their allies, are a recently (2014) reconstituted family of crickets, based on the type genus PhalangopsisServille, 1831 from South America. Priority for family-group names based on this genus dates from Blanchard's "Phalangopsites".
Oecanthus dulcisonans is a species of cricket sparsely but widely distributed in the Mediterranean Basin and in the Middle East.
Natasha Mhatre is a researcher in Canada at Western University whose research focuses on animal communication. Focusing on insect biomechanics, she is an assistant professor and NSERC Canada Research Chair in invertebrate neurobiology.
Oecanthus capensis, the Cape thermometer cricket, is a species of tree cricket. It has been found that the rate at which these crickets chirp follows Dolbear's law.
The Oecanthidae are a recently (2022) restored family of crickets based on the type genus OecanthusServille, 1831. They include "tree crickets", "anomalous crickets" and "bush crickets" and can be found in warmer parts of most of the world.