THEY MAIN­TAIN DIF­FER­ENT CIR­CLES OF FRIENDS

Animal Scene - - ANIMAL APPEAL -

Af­ter self-aware­ness comes so­cial aware­ness. Dol­phins have names for each other. Specif­i­cally, male bot­tlenose dol­phins have been recorded pro­duc­ing sounds and de­vel­op­ing in­di­vid­ual sig­na­ture whis­tles within their first few months of life. They are known to keep their names for life, and their sig­na­ture whis­tles help them iden­tify their first-or­der al­liances (friends) and sec­ond-or­der al­liances (friends of friends).

Mean­while, noise lev­els in the ocean have been go­ing up, thanks to the many sea­far­ing ves­sels that criss­cross the wa­ters, mak­ing it more dif­fi­cult for dol­phins to com­mu­ni­cate.

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