Table 3 The experimental results on the correlation between pigeon flight performance and temperature in 1925.

From: The impact of war on animal welfare: the Imperial Japanese Navy’s manipulation of pigeon behavior in WW II

Temperature

Pigeon flight performance

<0 °C

The pigeons became uncomfortable, and their flight ability deteriorated.

0–5 °C

There was little effect on their flight ability.

5–25 °C

It was the optimum operating temperature.

25–28 °C

There was little effect on their flight ability.

>35 °C

It was not suited for flying.

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