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Edited by Scott V. Edwards, Harvard University, Cambridge, MA, and approved December 6, 2019 (received for review October 18, 2019)
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Article Figures & SI
Figures
- Fig. 1.
Screenshots of a puffin scratching with a stick. Time stamps (hours:minutes:seconds) indicate time elapsed since the first panel. The stick’s location is indicated by an arrow. (A) Puffin picking up the stick. (B) Puffin holding the stick. (C) Puffin scratching its chest with the stick. (D) Nine hours later, the stick is still visible on the ground.
Data supplements
Supporting Information
- Download Movie_S01 (MP4) - Puffin scratching with a stick (Grimsey Island, Iceland).
- Download Movie_S02 (MP4) - Puffin taking a feather inside its burrow to line its nest (Grimsey Island, Iceland).
- Download Movie_S03 (MP4) - Puffin taking grass inside its burrow to line its nest (Grimsey Island, Iceland).
Evidence of tool use in a seabird
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