One of these is cicadas. The pronunciation is either si-ka-da /sɪˈkɑːdə/ or si-kay-da /sɪˈkeɪdə/.
Cicada (image credit wikimedia) |
These are insects who make a tremendous racket in the evenings. There is a wonderful segment from the BBC (David Attenborough) about cicadas here:
You can read more about them in-depth here:
http://www.brisbaneinsects.com/brisbane_cicadas/index.html
http://en.wikipedia.org/wiki/Cicada