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- <text id=92TT2610>
- <title>
- Nov. 23, 1992: Perfect Pitch
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1992
- Nov. 23, 1992 God and Women
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- THE WEEK, Page 23
- HEALTH & SCIENCE
- Perfect Pitch
- </hdr><body>
- <p>Scientists discover a parasitic fly with an unusual ear for
- cricket songs
- </p>
- <p> All summer long, male field crickets can be heard singing
- love songs to lure willing mates. But female crickets are not the
- only creatures these songs attract. Researchers reporting in
- Science magazine say they have found a tiny fly of the Ormia
- genus that can home in on a singing male as quickly as any
- lovesick cricket. How do they do it? With a hearing organ that
- works remarkably like a cricket's ear.
- </p>
- <p> Mosquitoes and other flies that make noise have feathery
- antennas to pick up low-frequency fly buzzing. Crickets, by
- contrast, make high-frequency chirps that require mechanisms
- much akin to eardrums to hear these sounds.
- </p>
- <p> In a classic example of what scientists call evolutionary
- convergence, female Ormia flies and female crickets have
- developed similar eardrum-like devices to serve differing goals:
- female crickets need male crickets to mate; female flies also
- need male crickets to reproduce. They use them as depositories
- for parasitic larvae that infest, feed on and ultimately kill
- their hosts.
- </p>
-
- </body></article>
- </text>
-
-