THE ANIMAL FILES

Sperm whale

Physeter macrocephalus

A short rhythm of clicks can mark a long social connection.

Sperm whale codas are patterned sequences of clicks produced in social settings. Researchers compare rhythm, tempo and group use, but detecting an individual difference in a recording is not the same as proving that a whale deliberately announces a name.[1]

Follow the evidence ↓
Sperm whale
Image: Gabriel Barathieu · Commons · CC BY-SA 2.0
Coda form
Short rhythmic click sequences[1]
Comparison features
Click number, rhythm and tempo[1]
Social scale
Social units and broader vocal clans[1]

The rhythm carries the pattern

Codas differ in click count, spacing and tempo. They occur in the social context of sperm whales rather than being interchangeable with every click made during prey searching. Researchers can compare repeatable patterns to investigate how vocal behaviour is shared within and between groups.[1]

Sharing water does not erase clan differences

Vocal clans use distinctive coda patterns and can overlap geographically. Animals in the same stretch of ocean do not necessarily join the same social association. Learned vocal patterns distinguish groups even where their physical ranges overlap.[1]

A detectable cue is not automatically an intentional label

Acoustic analysis may distinguish individual whales using fine properties of recordings. These individually distinctive cues do not by themselves show that a caller intentionally signals its identity. Demonstrating what a classifier detects is different from showing what another whale understands.[1]

A COMMON MIX-UP

Has every individually distinctive click pattern been proved to be a name?

No. An individually distinctive cue is not automatically a deliberate identity signal. Successful classification by humans does not settle the whale’s use or understanding of the sound.[1]

TRY A LITTLE REASONING

What extra evidence would strengthen a claim about a whale understanding identity?

Reveal the explanation

Behavioural responses to controlled sounds would address what listeners discriminate. A classifier’s accuracy describes a property of recordings, but on its own does not demonstrate the social meaning assigned by the whales.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Sperm whale (fixed revision; adapted and translated)
  2. NCBI Taxonomy — Physeter macrocephalus (identity and classification)

Last fact check:

One discovery leads to another

OrcaDifferent orca communities can share an ocean without sharing a menu.Orcinus orca ↗Common bottlenose dolphinAn echo helps find an object; a whistle helps keep contact.Tursiops truncatus ↗Harbour porpoiseA small coastal hunter follows fish through the water column.Phocoena phocoena ↗