It was, I guess, around 1980’s that I read an article on identifying geese, swans, and possibly cranes and ducks by the full moonlight. I believe the scientist’s name was Mr. Evans. The birds were in migration. This post refers to my previous post- If you can resolve it, you can solve it. The concept is that you are not using color, pattern, field marks, or size to identify certain birds. So, as you might imagine, you are observing birds that are in silhouette; between you and the full moon. I think it was a Smithsonian publication.
If you could determine the distance to the bird from your position, and then measure the diameter of the moon, and how much space the length of the swan occupied within the full moon, then you might get a good idea of the size of the swan. So, what is involved in this survey of birds in flight: Wing movement, wing holding, wing structure, and apparent wing length. NB.
The Thought: I was perusing for the word “sneer.” I think it was from Wiki- something. It said - Charles Darwin was probably the discover of sneer, as related mainly to dogs, possibly cats, and humans. What a bunch of nonsense!
If you wish to learn of the genesis of art, or science, nearly always will the Chinese be involved. For centuries ago the Chinese were using the art- science of face- reading.
Do you have a suspended needle? NB.
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