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Like some kind of karmic balance, it has often been remarked that the more plain-looking a bird is, the more beautiful its song, whereas those bestowed with gorgeous plumage tend to have simple calls. Research across hundreds of bird species has revealed a negative correlation between these traits, suggesting that there may be a trade-off in visual vs. acoustic signals when it comes to attracting mates. Likely falling at one end of this spectrum, Birds-of-paradise certainly are among the most extravagantly ornamented species in the world, but their highly varied calls often consist of harsh squawks and penetrating whistles, which although extremely loud are anything but melodious. Here, a male Wilson’s BoP (Cicinnurus respublica) raucously advertises his presence above his display ground, though if a female approaches he will fall silent and rely on his feathers for the real game of courtship. Waigeo Island, West Papua, Indonesia.

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© Chien C. Lee
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Birds, New Guinea
Like some kind of karmic balance, it has often been remarked that the more plain-looking a bird is, the more beautiful its song, whereas those bestowed with gorgeous plumage tend to have simple calls. Research across hundreds of bird species has revealed a negative correlation between these traits, suggesting that there may be a trade-off in visual vs. acoustic signals when it comes to attracting mates. Likely falling at one end of this spectrum, Birds-of-paradise certainly are among the most extravagantly ornamented species in the world, but their highly varied calls often consist of harsh squawks and penetrating whistles, which although extremely loud are anything but melodious. Here, a male Wilson’s BoP (Cicinnurus respublica) raucously advertises his presence above his display ground, though if a female approaches he will fall silent and rely on his feathers for the real game of courtship. Waigeo Island, West Papua, Indonesia.