You can tell how close penguins are to each other by how similar their voices are.
Penguins Adapt Their Voices To Sound Like Their Companions: New Study
Penguins can adapt their voices to sound like their friends
Turquoise Parrot Health, Personality, Colors and Sounds - PetGuide
Queen Mary University of London on The Conversation
The Bulbul bird, a charming and melodious songbird, graces our
Animal cognition – Berita, Riset, dan Analisis – The Conversation
African penguins – information, recherche et analyse – The
A survey of vocal mimicry in companion parrots
Highlight, take notes, and search in the book In this edition, page numbers are just like the physical edition
Why Penguins Communicate: The Evolution of Visual and Vocal Signals