Illustrated evidence-led field guide
One carefully sourced animal story at a time—kept on a permanent page with its evidence, uncertainty and corrections.
Today’s edition
Today’s field note
Rainbow Trout
Oncorhynchus mykiss
· 2 min read
Anglers often treat them as separate fish, but steelhead and rainbow trout share identical DNA. The only difference is a lifestyle choice: whether a young fish swims to the ocean or stays in its home river.
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