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Updated: Jul 15, 2026
04:51
A Modified Mirror Test as a Visual Guide for the Self-awareness Trait in Wild Antarctica Penguins, Pygoscelis adeliae
Published on: July 8, 2025
Onshore energetics in penguins: theory, estimation and ecological implications.
Lewis G Halsey1, Craig R White, Andreas Fahlman
1Centre for Ornithology, School of Biosciences, University of Birmingham, Edgbaston B15 2TT UK. l.g.halsey@bham.ac.uk
Summary
Penguins have high walking costs, but this study found pedestrian locomotion is a minor energy expense for king penguins ashore. This research offers a simple method to estimate onshore energetics for birds.
Area of Science:
- Animal locomotion
- Ecological energetics
- Avian biology
Background:
- Penguins exhibit high energetic costs for walking compared to other running birds.
- The ecological impact of penguins' pedestrian locomotion costs remains under-explored.
Purpose of the Study:
- To introduce a logistically simple method for accurately estimating onshore energetics in penguins.
- To quantify the energetic contribution of pedestrian locomotion to the total energy expenditure of king penguins while ashore.
Main Methods:
- Developed a novel method using body mass, morphometrics, and distance moved to estimate energy expenditure.
- Validated the method against existing field-based energy expenditure estimates, confirming its accuracy and logistical advantages.
Main Results:
- The new method provides accurate onshore energetic estimations with high logistical simplicity.
- Despite high instantaneous costs, pedestrian locomotion accounts for only approximately 1.0% of the total energy expended by king penguins ashore.
- King penguins allocate 30-50% of their time to activities on land, including walking several kilometers to and from colonies.
Conclusions:
- Pedestrian locomotion, while costly per step, represents a negligible component of the overall energy turnover for king penguins during their time ashore.
- The developed method offers a practical tool for researchers studying avian energetics and locomotion.
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