armed field cricket

Gryllus armatus Scudder 1902


map	composite map	males	male

44 s of calling, from Eddy County, N. Mex., 25.1°C. Dominnant frequency 4.6 kHz. Recording by D.B. Weissman (S15-58, R15-177); used by permission.

This spectrogram is a 10 s excerpt of the 43 s audio file accessible above. The excerpt begins at 10 s.

Spectrogram showing first 4 chirps of 10 s sample above.

Spectrogram showing first chirp of 2 s sample above, slowed to 1/10th speed to make apparent the introductory trill that some males of this species make.

Song:	Weissman and Gray (2019) described the song as usually having an "introductory trill" of 2-8 evenly spaced pulses at the beginning of each burst of chirps, usually followed by 2 pulses per chirp (range 1-3), until the burst is over. Pulse rate 38.5.
Identification:	A key to the adult males of native US Gryllus is in Weissman and Gray (2019).
DNA:	See Gray, Weissman, et al. (2020).
Habitat:	Watered lawns, dumps, gas stations, cracks in concrete, dry ground, and dry ponds and lake beds.
Life cycle:	Two generations per year; possibly only one generation in a year under drought conditions. No egg diapause.
Season:	Spring into summer.
Name derivation:	Latin: "arma" = "weapons", "atus" = "provided with"; in reference to the spines on the hind tibia.
More information:	Subfamily Gryllinae, genus Gryllus.
References:	Weissman and Gray 2019, pp101-119, pp110-119; Gray, Weissman, et al. 2020.
Nomenclature:	OSF (Orthoptera Species File Online).