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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Femke M Holwerda conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, reviewed drafts of the paper, photography, Measurements.

Jeff J Liston wrote the paper, reviewed drafts of the paper, photography.

Data Deposition

The following information was supplied regarding data availability:

No raw data to submit outwith the observations and measurements in the paper.

Funding

The authors received no funding for this work.


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