Blackbird songs have a strange music. The Red-winged Blackbird can be heard in nearly every marsh on the continent — bold, brassy, and piercing. The songs may not seem musical, but they definitely get your attention. Brewer’s Blackbirds, which live in open habitats like farms and grasslands, make a wet, slap-in-the-face sound. The combined voices of Tricolored Blackbirds — like this one in a California marsh — sound like a snarling catfight. Another Western bird, the Yellow-headed Blackbird, makes raucous growls, wails, and whistles.

More info and transcript at BirdNote.org. 

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