Oecanthus fultoni

Distinguished from other Oecanthus species by black markings on the first two antennal segments. In the western United States, sympatric with O. rileyi; O. fultoni has a slower chirp rate and is less loud than O. rileyi. Both species have regular chirps, unlike other North American Oecanthus. Western populations chirp faster than eastern populations. Often identified by sound alone when individuals are high in oak canopies.

Found in shrubs, vines, fruit trees, broadleaved trees, and oaks. Rarely occurs in grass. In the western Great Plains, chirp rate increases, suggesting local adaptation or thermal environment influence.

Throughout the United States except the southeastern portion. Western populations may represent a distinct chirping rate variant. Sympatric with O. rileyi in the far western United States.

Adults active from mid-July to mid-November. One generation per year.

Both nymphs and adults feed on leaves, causing minimal damage. Adults create feeding holes in ripe fruits including apples, plums, peaches, and cherries, leading to fruit rot.

• apple - fruit damagefeeding holes in ripe fruit cause rotting
• plum - fruit damagefeeding holes in ripe fruit cause rotting
• peach - fruit damagefeeding holes in ripe fruit cause rotting
• cherry - fruit damagefeeding holes in ripe fruit cause rotting
• oak - habitatindividuals may occur high in canopy, detectable only by sound

One generation per year. Eggs are laid in twig cambium; female drills a hole, creates a row of punctures on one side, and seals the opening with excrement or chewed plant tissue. Nymphs develop wings slowly and are pale and slender. Developmental progression from egg through nymphal stages to adult spans the growing season.

Males chirp in groups. Chirp rate varies with ambient temperature, increasing in warmer conditions. Males may align wings with gaps in foliage or chew holes in leaves to reduce acoustic interference and intensify calls. Courtship involves a softer song after female attraction; male exposes metanotal gland secreting a substance that female feeds on during spermatophore transfer.

Herbivore and minor frugivore. Omnivorous tendencies include predation on small insects such as aphids. Serves as prey for various insectivores. Acoustic signaling contributes to soundscape ecology of late summer and autumn habitats.

Widely used in film and television soundtracks to evoke quiet summer nights. Chirp rate enables temperature estimation: approximately 40 plus the number of chirps in 15 seconds yields Fahrenheit temperature (Dolbear's law application). Occasionally a minor orchard pest where pesticide application is inconsistent; normally not damaging in regularly sprayed orchards. Named for entomologist Bentley Ball Fulton, who established foundational work on North American cricket classification.

• Oecanthus niveusHistorically misapplied to O. fultoni before 1960; distinct species described by De Geer in 1773
• Oecanthus rileyiSympatric in western United States; distinguished by faster chirp rate and louder volume
• Oecanthus argentinusPrairie tree cricket with different distribution and habitat preferences
• Oecanthus californicusWestern tree cricket with different geographic range
• Oecanthus nigricornisBlack-horned tree cricket with different antennal markings
• Oecanthus quadripunctatusFour-spotted tree cricket with distinctive spot pattern

The common name 'snowy tree cricket' does not indicate winter activity; adults are active mid-July through mid-November. The name 'thermometer cricket' reflects the temperature-chirp relationship, not any intrinsic thermal property.

• acoustic communication
• temperature-dependent behavior
• film sound effect
• orchard pest
• tree cricket

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• Catalogue of Life
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• Grasshoppers of Colorado
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• Grasshoppers of Colorado
• Bug Eric: Tree Cricket Courtship
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