Atmospheric conditions
This protocol is extracted from research article:
Biomechanics of hover performance in Neotropical hummingbirds versus bats
Sci Adv, Sep 26, 2018; DOI: 10.1126/sciadv.aat2980

To calculate the Reynolds number and induced power required to hover, we determined the average atmospheric conditions at the Las Cruces Biological Station based on the available on-site recordings (https://archive.tropicalstudies.org/meteoro/default.php?pestacion=1). The barometric pressure (880 ± 2 mbar), temperature (21.4 ± 7.4°C), and relative humidity (70.5 ± 18.8%) were averaged over the research period (4 February 2016 through 15 March 2016). We then calculated the average air density (1.04 kg m−3) and dynamic viscosity (1.79 × 10−5 kg m−1 s−1) using the ideal gas law and Sutherland’s law (25).

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