some information I foundFor example, I can draw a picture in the correct proportion without looking at any animal or using a ruler. For this reason, I can measure the size of a flying bird in centimeters or in the air.

The Buzzard Problem - Differentiating Steppe, Jackal and Forest Buzzards - Bryn De Kocks
Truth be told, I first started writing this article over a year ago, and it was a lot more bloated than this piece is. Over the past several years I took a
