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Odorrana tormota | Concave-eared Torrent Frog | Photo by Fang Zhang

In populations with highly skewed male sex ratios, females may be overwhelmed with male suitors. In these situations, female choice may be nullified. However, Chen et al. (2024) recently documented a strategy that maximizes Odorrana tormota female choice. These frogs live in noisy, waterfall environments with a 10:1 male to female sex ratio. Both males and females call to attract partners, but field observations and laboratory mate trials both indicate that females show their willingness to mate by blinking at a particular male. To further test the importance of female blinking, males were given preference tests with two simultaneous videos, one of a blinking female and one without blinking. Those tests showed a clear male preference for blinking females. All together, these results indicate that blinking is an effective form of private communication for this species with intense male competition, and this may be the first time blinking has been shown as a social signal in a non-primate species.

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Total Amphibian Species by Order

222 Caecilians 816 Salamanders 7,699 Frogs