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Double-wattled cassowary (photo)

IMAGE number
SMT1217000
Image title
Double-wattled cassowary (photo)
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photograph
Image description

Scientists believe the double-wattled cassowary’s bony helmet, called a casque, helps it receive calls from other birds at frequencies as low as 23 hertz. The casque is filled with air pockets and covered in keratin (the hard protein structure in horns), which amplifies sound like a microphone.

Photo credit
© Smithsonian Institution / Photo © National Zoological Park, Smithsonian Institution / Bridgeman Images
Image keywords
animal / bird / wild / wildlife / birds / helmet / hearing / crested / animals / zoological / crest / double-wattled cassowary / exotic / photography / nature / cassowary / horned / blue / wattled / wattles / zoology / casque / zoo / Photograph / Photography / Mzphoto
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Permission required for non-editorial use (inc book and magazine covers). Please contact us
Largest available format 2592 × 3888 px 2 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB]
Large 2592 × 3888 px 219 × 329 mm 2.0 MB
Medium 683 × 1024 px 58 × 87 mm 774 KB

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