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What Leads the Swallows Astray

* Re “Is This Bye, Bye Birdies?” March 18:

Two hundred years ago, when the missions were founded, Southern California was essentially a desert.

The only communities, very small ones, were clustered around the missions. They were always situated on a watercourse near the ocean, the best sites available.

Therefore, when the swallows migrated, there were not many places for them to set up housekeeping. Thus “they came back to Capistrano.”

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Now there are thousands of places where they can establish a comfortable nest. And I’d reason that that’s at least one of the principal reasons so few show up today: too much competition.

JACK CARPENTER

San Juan Capistrano

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