why sparrows change their tunes

Wild Neighbors: The Baptista Tapes: Why Sparrows Change Their Tunes. Category: Columns from The Berkeley Daily Planet.

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About fromthethicket

I'm a landscape historian and professor emeritus of landscape architecture, UC Davis. I live in San Francisco.
This entry was posted in california academy of sciences, people, wildlife. Bookmark the permalink.

One Response to why sparrows change their tunes

  1. RKB says:

    Thanks! This is an amazing article. I remember walking on Twin Peaks in the late 1980s, listening to the white-crowned sparrows. The trill at the end has changed since then – it’s less defined and more truncated. In fact, I feel that the whole song has become less clear.

    I wonder if population density (hence, competition among the males) might also have something to do with it.

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