Found in Richmond, CA --male. "Male crickets are the only ones that chirp. They have ridges on their wings that they rub together that act like a comb and file to form an instrument. Their left forewing contains 50-300 teeth that are raised and angled. This wing is rubbed against the upper hind edge of the right forewing, or scraper. There are two types of songs that the male cricket produces. The calling song attracts females and repels other males and is very loud. The courting song is used when the female is near and is a very quiet song. Once courted, the mating process begins and the female lays her eggs usually during the late summer to early fall." from www.pestproducts.com cricket-information.htm
cricket or grasshopper
Identify Insect - loud harmonious sound at night - expect it to be a cricket - can you confirm please. Thanks.