Comparing bird and human soaring strategies

Zsuzsa Á Kos, Máté Nagy, T. Vicsek

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Gliding saves much energy, and to make large distances using only this form of flight represents a great challenge for both birds and people. The solution is to make use of the so-called thermals, which are localized, warmer regions in the atmosphere moving upwards with a speed exceeding the descent rate of bird and plane. Whereas birds use this technique mainly for foraging, humans do it as a sporting activity. Thermalling involves efficient optimization including the skilful localization of thermals, trying to guess the most favorable route, estimating the best descending rate, etc. In this study, we address the question whether there are any analogies between the solutions birds and humans find to handle the above task. High-resolution track logs were taken from thermalling falcons and paraglider pilots to determine the essential parameters of the flight patterns. We find that there are relevant common features in the ways birds and humans use thermals. In particular, falcons seem to reproduce the MacCready formula widely used by gliders to calculate the best slope to take before an upcoming thermal.

Original languageEnglish
Pages (from-to)4139-4143
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume105
Issue number11
DOIs
Publication statusPublished - Mar 18 2008

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Birds
Hot Temperature
Atmosphere

ASJC Scopus subject areas

  • Genetics
  • General

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Comparing bird and human soaring strategies. / Kos, Zsuzsa Á; Nagy, Máté; Vicsek, T.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 105, No. 11, 18.03.2008, p. 4139-4143.

Research output: Contribution to journalArticle

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