Calls from at least two birds flying in and around redwoods at dawn. These more nasal calls were given less often, and most often when birds neared a tree, so I suspect they indicated that a bird was approaching or leaving a nest.

bird-seen:no

playback-used:no

MAMU keers, groans, and wing beats. Recorded with an SM4.

Recorded using a Song Meter Mini during a MAMU survey. Two birds, keer calls and slight groan calls, heard only.

bird-seen:no

playback-used:no

Loud MAMU wing beats and keer calls.

MAMU wing beats and keer calls.

Long wing beats and keer calls.

The beginning 10 seconds of this recording has 3 highlights contained in the subsequent unedited body. These highlights are two quavered grunts, overlapping keers and the wing noise of a close flyby. They were put at the beginning of the recording to display well on the spectrogram. The remainder of this 6 minute recording captures close flybys of multiple Marbled Murrelets. This recording has one keer and two close 'modified' keers. This recording was made with an iPhone 5s with a Sennheiser shotgun microphone and Røde Rec application.

bird-seen:no

playback-used:no

Loud MAMU keer and groan calls and jet/wing detection.

Wing beats, keer, and groan calls.

This 18 second recording captures a moderately close flyby of at least two Marbled Murrelets. This recording was made with an iPhone 5s with a Sennheiser shotgun microphone and Røde Rec application. This recording has not been edited in any manner. but is a cut of a 10 minute recording.

bird-seen:no

playback-used:no

Loud MAMU wing beats and keer and groan calls.

wing noise especially at 4.08 and 4.50

MAMU keer calls, groan calls, and wing beats.

Calls from three birds flying over and around the redwoods at dawn.

bird-seen:yes

playback-used:no

Good MAMU keers, groans, and wing/jet detection.

This 45 second recording captures a moderately close flyby of at least two Marbled Murrelets. This recording has keers and a few broad spectrum grunts. This recording was made with an iPhone 5s with a Sennheiser shotgun microphone and Røde Rec application. This recording has not been edited in any manner but is a cut of a 10 minute recording.

bird-seen:no

playback-used:no

One faint keer call then multiple loud keer calls and a few groan calls. Recorded on a Song Meter Mini.

bird-seen:no

playback-used:no

This 33 second recording captures a close flyby of at least two Marbled Murrelets. This recording has keers. This recording was made with an iPhone 5s with a Sennheiser shotgun microphone and Røde Rec application. This recording has not been edited in any manner but is a cut of a 10 minute recording.

bird-seen:no

playback-used:no

Super awesome example of a MAMU jet detection.

Jet and keer calls.

Many loud keer calls. Recorded on a Song Meter 4.

bird-seen:no

playback-used:no

MAMU keers calls, two birds, one with interesting keer calls.