Male Green Frog

Summer is Finaly Here....

Peep!

Synchronous Chorusing of two Peepers

Females have a perceptual bias towards the first call of a sequence. The males have evolved to
make call-timing adjustments to their own free-running call period in response to competitors in their immediate environment. This is a short segment of a recording of the advertisement calls of two males. The frogs were approximately four feet apart; the microphone was held equidistant between the two. In this trace, one frog delays his call until he becomes the leading caller. As this calling bout continued, the other frog subsequently adjusted his timing to become the first caller; this pattern repeates througout the recording. The original audio can be found by clicking on the title of this post. Our next step is a stereo recording with two microphones as the live effect is striking.

More Peeping

Spring Peeper Call

This is a spectral analysis of a recording we made tonight of a spring peeper. The fundamental or dominant frequency is consistently near 3200Hz. The male calls as loudly as possible at this pitch to attract a mate. Distinct harmonics are seen at 2x (6400Hz) and 3x (9600Hz) with overtones spaced evenly between at 1.5, 2.5, etc. Audacity is the audio tool used for presentation and analysis.

Spring Peepers

Spring Romance

Fall Visitor

One of three visitors and likely winter guests at our garden pond.