Drylines may be detected by Doppler radar when insects and insect-eating birds congregate along it.On the radar screen,the echo from insects and birds shows up as a thin line,called a fine line.

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This statement is true. Doppler radar can detect drylines by picking up the echo from insects and bird activity along it, which appears as a thin line called a fine line on the radar screen.

Drylines May Be Detected by Doppler Radar When Insects and Insect-Eating