Family (Alpha): ACRIDIDAE GRYLLACRIDIDAE GRYLLIDAE GRYLLOTALPIDAE RHAPHIDOPHORIDAE ROMALEIDAE TETRIGIDAE TETTIGONIIDAE TRIDACTYLIDAE
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Oecanthus nigricornis Walker, 1869 - Black-Horned Tree Cricket
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Taxonomy
Family: Gryllidae
Subfamily: OecanthinaeTribe: OecanthiniComments: One of eighteen species in this genus that occur in North America north of Mexico (SINA, 2018), eight of which have been recorded in North Carolina
Identification
Field Guide Descriptions: Online Photographs: BugGuide , Google Images ,
iNaturalist , GBIF SINA 589a.htm Comments: The basal segments of the antennae have two dark, uncurved marks but are usually overlain with dark shading, sometimes completely. The shafts of the antennae are also blackish, as is the top of the head and pronotum and the legs.Total Length [body plus wings; excludes ovipositor]: 11.5-14 mm (Blatchley, 1920)Forewing Length: 10-12 mm (Blatchley, 1920)Singing Behavior: Songs consist of continuous trills that are very similar to those of the four-spotted tree cricket and other members of the nigricornis species group. Walker (1963) provides graphs showing the relationship between carrier frequency or temperature and the number of syllables produced per second, which are characteristic for each of these species.Recording playback at normal speed.
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Distribution in North Carolina
County Map: Clicking on a county returns the records for the species in that county.
Adult Dates: Click on graph to enlarge
Habitats and Life History
Habitats: This species is strongly associated with successional fields, especially cut-over areas that are rich in raspberries and goldenrods (Blatchley, 1920). A record we have from Ashe County comes from exactly this sort of habitat, in an abandoned Christmas tree farm. Diet: Observation Methods: Abundance/Frequency: Adult Phenology:
Status in North Carolina
Natural Heritage Program Status: Natural Heritage Program Ranks: State Protection: Comments:
Image Gallery for Oecanthus nigricornis - Black-Horned Tree Cricket Recorded by: Steve Hall and Bo Sullivan
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