Mostly, it sounds like common species of what, in English, are called water=
-boatmen (Corixidae). These can be found everywhere there is fresh water an=
d decaying floral debris in vernal pools, in shallow water by ponds and lak=
eside, and even by the curb after a spring or summer rain, etc.
We first encountered these signatures in late March, 1984, at Mono Lake jus=
t east of the Sierra Nevada Mountains along the Eastern border of Californi=
a while recording the Great Basin spadefoot toad (Spea intermontana) in a s=
tudy for the University of California in Santa Cruz led by the late Ken Nor=
ris (who identified how dolphins generate and receive echolocation signals)=
.. We were recording to see if the tadpoles generated sound (they do), and =
if the vocalizations of the adults carried in water as well as air (they do=
).. At the same time, we picked up these odd scraping sounds (water-boatmen=
) but couldn=92t identify them, at first. But after filling some buckets wi=
th water and mud from the pond, and sifting through the material, we were l=
eft with the water-boatmen and were able to record them separately, thus fi=
guring out the source.
Glen Ellen, CA 95442
TED Global talk: https://www.ted.com/talks/bernie_krause_the_voice_of_the_n=
> On Feb 3, 2018, at 1:20 AM, [naturerecordists] <n=
> Below the links to soundcloud for two of my underwater recordings from It=
> Sounds are similar to that of your recording, but surely emitted by diffe=
rent species of small aquatic insects.
> https://soundcloud.com/marco- pesente/corixa-punctata-sound <https://soun=
> https://soundcloud.com/marco- pesente/micronecta-sp-lesser- water <https:=