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Male Greater Prairie-Chicken (Tympanachus cupido) displaying on a lek, Stock Photo, Picture And Rights Managed Image. Pic. AAM-AAES42252 | agefotostock
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Marsh frog (Pelophylax ridibundus) in a pond with inflated vocal sacs on either side of its head used to amplify its sound to attract mates Stock Photo - Alamy
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Vector construction. The blunt-ended 4.1 kb Bam HI and Sac I fragment... | Download Scientific Diagram
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Animal biology. Biology; Zoology; Physiology. THE MULTICELLULAR ANIMAL 63 branes. Specialization for secretion and excretion leads to gland formation. Glands may be unicellular and scattered here and there in the surface
![He inflates his vocal sacs on his throat, providing an effective chamber to amplify the sound of air rushing across his vocal chords. Each species has its own specific call -- it's He inflates his vocal sacs on his throat, providing an effective chamber to amplify the sound of air rushing across his vocal chords. Each species has its own specific call -- it's](https://preview.redd.it/bm0tpuygfax51.jpg?auto=webp&s=52c02e49559ee3dbb69c94544e74165545dbd509)