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They mean “GISS” - General Impression, Size, and Shape. Allegedly orginated as an acronym in WWII for identifying planes but caught on in the birding world.
by joshuahedlund 3y ago
They mean “GISS” - General Impression, Size, and Shape. Allegedly orginated as an acronym in WWII for identifying planes but caught on in the birding world.
- jameshart 3y agoI’d heard the origin among borders as being a short form of “it just is”. How can you tell that bird’s a blackbird not a starling? Well, by its.. you know. It just is.