ML608879312
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Observation details
ID based on call, habitat and date. Location…. The southernmost lake has a stream exiting its southern shore. The stream winds through the trees going to the southeast before going under Willow St via a drain of some sort. Approximate GPS: 33.804840, -118.087271 The recorded call was coming from the ground along the stream. Meaning, the habitat matches NOWA. The call is a crisp metallic chink type of sound. It’s strongest frequencies are between 5k and 6k. Those frequencies are strong enough to reverberate in the recording, creating what looks like a “shadow” after the call in the visual graph. The call was given repeatedly for over a minute. All of those characteristics match NOWA. There are some other calls that are similar to this that I checked just to eliminate. OCWA gives a very similar call, but the OCWA call has two key differences. First, it’s stronger in the upper frequencies, with 7-9k typically being just as strong as 5-6k. Second, it has a very quick V shape, starting at 10k, descending, and ascending back up (all very quickly). It’s also typically coming from trees/shrubs rather than on the ground along a stream. The habitat does suggest COYE, and they are indeed all over the park. They also make a similar crisp call. Their call has a much wider frequency range, being quite strong from 3k to 10k. Those strong lower frequencies give it a huskiness in tone to the call. It also has a specific shape, being a very quick up/down motion. That ^ shape is plainly visible in the graph when zooming way in on the lowest frequencies. But the frequency range and note shape separate the NOWA and COYE calls. (COYE is posted below.) CATO is also a notable comparison. It's also present in the park. It makes a crisp call right at 5k. It's much more limited in frequency than NOWA, being only a dot right at 5k. For what it’s worth…. I was at this exact spot last year (Sept 16, 2022) and heard this same call, though I didn’t get a decent recording that year. But I suspect this is actually a returning bird. Or at a minimum, I suspect NOWA come to this spot when they migrate through in the fall.
Technical information
- Recorder
- Microphone
- Accessories
- Original file size
- 16 MB