Oecanthus quadripunctatus
Beutenmüller, 1894
Four-spotted Tree Cricket
Oecanthus quadripunctatus, the four-spotted tree cricket, is a small in the Oecanthinae. It is one of five tree cricket species documented in Colorado and occurs across North America. The species is distinguished by markings on the first two antennal segments, though identification to species can be challenging due to the minute size of these diagnostic features. Males produce songs using modified forewings and possess a metanotal gland that secretes a substance consumed by females during courtship.
Pronunciation
How to pronounce Oecanthus quadripunctatus: /ɛəˈkænθəs ˌkwɒdrɪˌpʌŋkˈteɪtəs/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Identification relies on examination of markings on the first two antennal segments at the base. Distinguished from other Oecanthus by specific spot patterns on these segments: O. quadripunctatus has four spots (two on each of the first two segments), whereas O. nigricornis has black with white tips, O. argentinus has different antennal markings, O. californicus and O. fultoni have distinct spot arrangements. Examination requires magnification due to small size of diagnostic features. Males can be distinguished from females by their expanded, paddle-shaped forewings.
Appearance
Small, slender with elongated . Body length approximately 20 mm maximum. Males have expanded, paddle-shaped forewings modified for sound production with intricate venation patterns. Females have slender forewings hugging the body tightly and a short, stout ovipositor visible at the tip. Diagnostic markings occur on the first two segments at the base of the antennae.
Habitat
Found in grassy fields, meadows, and tall weeds. Occurs in vegetation ranging from ground level to shrubs. In Colorado, documented in including yucca stands and weedy areas. Less strictly arboreal than some tree .
Distribution
North America. Documented in United States: Alabama, Arizona, Arkansas, California, Colorado. Presence in Colorado confirmed among five Oecanthus in the state.
Seasonality
active late summer through early fall. In Colorado Front Range, peak activity observed in September.
Diet
, feeding on plants and small insects such as aphids.
Life Cycle
inserted into berry canes and other plant stems using the female's ovipositor. Developmental stages and mode not documented in available sources.
Behavior
Males sing to attract females, lifting forewings to 90-degree angle in -shaped posture. Some males align wings with gaps in foliage or chew holes in leaves to reduce acoustic interference and intensify calls. Upon female approach, males switch to softer orientation song and expose the metanotal gland on the ; females feed on glandular secretion during mating. This secretion serves as distraction while male transfers . Female feeds on secretion for several minutes post-mating.
Ecological Role
of small insects including aphids; also functions as herbivore. Serves as prey for larger and vertebrates. Male songs contribute to acoustic environment of grassland and meadow .
Human Relevance
Subject of citizen science and bioacoustic research. Not documented as agricultural pest. Provides accessible introduction to and for naturalists.
Similar Taxa
- Oecanthus nigricornisBlack-horned tree ; distinguished by black with white tips versus four spots on antennal segments
- Oecanthus argentinusPrairie tree ; differs in antennal markings and preference
- Oecanthus californicusWestern tree cricket; distinct antennal spot pattern
- Oecanthus fultoniSnowy tree cricket; distinct antennal spot pattern
More Details
Acoustic behavior
Male songs produced by stridulation: a scraper on one wing drawn across a file on the other wing near the wing base. Rate of movement too rapid for standard video capture.
Research resources
Detailed identification resources available at Singing Insects of North America (singinginsects.org) and Oecanthinae.com, maintained by tree researcher Nancy Collins.