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Bullfrogs mating

Bullfrogs mating

C003/7626

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Credit

KENNETH H. THOMAS / SCIENCE PHOTO LIBRARY KENNETH H. THOMAS / SCIENCE PHOTO LIBRARY

Caption

Bullfrogs (Lithobates catesbianus, formerly Rana catesbeiana) mating. Female bullfrogs show great asynchrony in the timing of periods of ovulation and sexual receptivity. The duration of sexual activity for any individual female is extremely short, generally lasting only one night. During this period, the female actively moves from male to male and/or territory to territory. Mate selection is based on the females' choice and amplexus doesn't occur until the female makes physical contact with the male. Ludlow, MA.

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