Oecanthus argentinus
Saussure, 1874
Prairie Tree Cricket
Oecanthus argentinus, commonly known as the prairie tree , is a small orthopteran in the Oecanthidae. It occurs in North and South America, including the southwestern and central United States, Mexico, and Argentina. The is one of five tree crickets recorded from Colorado and is associated with grassy fields and meadow rather than strictly arboreal environments.
Pronunciation
How to pronounce Oecanthus argentinus: //iːˈkænθəs ˌɑːrdʒənˈtiːnəs//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other Oecanthus by antennal segment markings on the first two segments at the antennal base; precise pattern differs among . Males are readily identified by their expanded, paddle-shaped forewings and singing posture with wings raised at 90 degrees to the body. Females differ from males by slender, tightly appressed forewings and visible ovipositor. Separation from O. californicus, O. fultoni, O. nigricornis, and O. quadripunctatus in overlapping ranges requires examination of antennal markings.
Appearance
Small, slender reaching approximately 20 mm in length. Body pale green to yellowish-green. Males possess greatly expanded, paddle-shaped forewings that form a broad musical apparatus; females have narrow forewings hugging the body tightly and a short, stout ovipositor visible at the tip. identification relies on markings of the first two antennal segments, though this requires close examination.
Habitat
Grassy fields, meadows, tall weeds, and prairie vegetation. In Colorado, found in yucca patches and tall herbaceous vegetation. Less strictly arboreal than some ; occupies herbaceous and shrubby vegetation rather than high tree .
Distribution
North America: southwestern and central United States including Colorado, Arizona, Arkansas, Alabama. Mexico. South America: Argentina (Northeast region).
Seasonality
active late summer through early autumn in Colorado Front Range; peak activity in September.
Life Cycle
Hemimetabolous development. Females insert into berry canes and plant stems using the ovipositor. Eggs overwinter; nymphs develop through summer, reaching maturity in late summer. Specific details of nymphal instars and developmental duration not documented.
Behavior
Males produce -specific songs by stridulation, drawing a scraper on one forewing across a file on the other. Some males position themselves at gaps in foliage or chew holes in leaves to reduce acoustic interference and amplify calls. Upon female approach, males switch to softer orientation song and expose the metanotal gland on the , secreting a substance that females feed on during mating. This secretion distracts females from consuming the , allowing sperm transfer to complete.
Ecological Role
of small soft-bodied insects including aphids; also consumes plant material. Serves as prey for insectivorous vertebrates and . Contributes to acoustic environment of grassland .
Human Relevance
Subject of bioacoustic research and citizen science monitoring. Occasionally mistaken for grasshoppers in agricultural contexts. Featured in educational resources on insect communication and courtship .
Similar Taxa
- Oecanthus californicusWestern tree cricket with overlapping range in western North America; distinguished by antennal markings and song characteristics
- Oecanthus fultoniSnowy tree cricket, often associated with woody vegetation; differs in antennal markings and preference
- Oecanthus nigricornisBlack-horned tree with darker coloration and distinct antennal markings
- Oecanthus quadripunctatusFour-spotted tree cricket with characteristic antennal spotting pattern