Bill
Definition
A penguin's bill (beak) is a keratinous structure adapted for catching and gripping slippery prey like fish, squid, and krill. The inside of the bill and tongue are lined with rear-facing spines called papillae that prevent prey from escaping. Bill size and shape vary across species: the large bill of the emperor penguin handles fish and squid, while the shorter bill of the Adelie is optimised for krill. Bill colour and markings also play a role in species recognition and mate selection.
Related Terms
Related Species
Species where bill is especially relevant.
Frequently Asked Questions
What does bill mean in penguin biology?
A penguin's bill (beak) is a keratinous structure adapted for catching and gripping slippery prey like fish, squid, and krill. The inside of the bill and tongue are lined with rear-facing spines called papillae that prevent prey from escaping. Bill size and shape vary across species: the large bill of the emperor penguin handles fish and squid, while the shorter bill of the Adelie is optimised for krill. Bill colour and markings also play a role in species recognition and mate selection.