[pct-l] identifying birds by song

[PCT at DelNorteResort.Com (stillroaming)]

And to further add to the trivia:

Birds that move from area to area tend to keep the same song, without
modification.

On the other hand, birds that tend to stay in one area modify their song as
a form of competition with other males as a means to attract a mate. (He
with the most clever song gets the girl!)

The latter group of birds could be the tough ones to identify.

Scott

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