How scientists track narwhals

Filed under Narwhal · Narwhal Whales editorial team

Studying narwhals presents distinctive scientific challenges. These medium-sized whales inhabit remote, ice-covered waters of the Arctic and spend extensive periods diving to great depths, making direct observation difficult. To overcome these obstacles, researchers have developed multiple complementary methods for tracking and understanding narwhal populations and behaviour.

Satellite tags represent a primary tool for narwhal research. Scientists carefully capture individual animals and attach tags that transmit location data and dive records over months, allowing researchers to map migration routes and document deep-diving patterns that would otherwise remain invisible. Aerial surveys conducted from aircraft and visual observations from research vessels help scientists estimate overall population sizes and distribution across Arctic regions. These methods work particularly well during seasonal ice breaks when narwhals are more accessible and visible.

Passive acoustic monitoring offers another valuable approach. Specialized underwater recorders detect the distinctive clicks and calls that narwhals produce, revealing where animals are present and when they occupy particular areas. This non-invasive technique provides data without requiring direct contact with the animals. Increasingly, scientists recognize the value of Indigenous knowledge as well. Inuit communities have accumulated centuries of detailed observations about narwhal movements, seasonal behaviour, and population trends. Collaborating with local hunters and knowledge keepers provides essential context that strengthens scientific understanding and helps researchers interpret their findings within a broader ecological and cultural framework.

Sources: NOAA Fisheries — Narwhal; IUCN Red List — Narwhal (Monodon monoceros). Educational information only. See our sources & fact-check policy.

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