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Of Grand Forks • East Grand Forks May 5, 2022
Published by: Wick Publications
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Issue # 1,268
TIDBITS CONSIDERS ®
FROGS by Janet Spencer
Come along with Tidbits as we consider the remarkable frog!
SONG OF LOVE
David Kent 2534 17th Ave. S. Grand Forks
218-779-5458 dkent@nodakins.net
Blood Giving is for “All Seasons”! Seasons”! Share the beauty of the season by donating a pint of blood in the month of May. All donors will receive a FREE 4-pack of annuals compliments of All Seasons Garden Center Call or e-mail for appointment:
780-LIFE (5433) blooddonations@altru.org www.dakminnbloodbank.org
• Gray tree frogs live in the woodlands of the eastern U.S. The female listens to the trilling call of males. When she decides which male has the call she likes best, she hops up to him and nudges him with her nose, indicating her willingness to mate. Scientists wanted to find out what kind of a male frog's call was the most attractive. Is it the loudest, longest, nearest? Some biologists decided to find out. • They set up a chamber with two speakers, then put one female at a time in the chamber. Each speaker emitted a slightly different mating call. They discovered the pulse rate of the call is the most important: females prefer males whose call has a slow rate. This may be because a different species of frog has a faster call. The next most important factor was the duration of the call. Females prefer longer calls over shorter calls. Longer calls require more energy expenditure, meaning that the female seems to want to push the male to his physical limits. • Further research proved that some males win a mate without uttering a single call. They simply hang out next to a noisy male and grab the female as soon as she comes around. Turn the page for more!
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