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Q&A Effect of paint on the flight ability of birds?

In my world my protagonist is stuck in a city that is being lain siege to. The city needs to get a message to a fleet. Messages are delivered by sharp-skinned hawks (actual bird), but the problem...

3 answers  ·  posted 6y ago by Nicholas Hattingh‭  ·  last activity 6y ago by Nicholas Hattingh‭

Question biology