Wildlife palette

What colors do you all use for wildlife and landscapes? The project is the moths of ohio, so Im looking for some recommendations for colors to put in a custom palette, probably mostly browns and greys. I currently have the Kuretake Gansai Tambi 100 set and the Grumbacher Academy watercolor set (they come in tubes, but I bought all 60). Needless to say, I made a mistake in getting so many, because now making a mixing chart feels impossible for me. so im looking to set up a smaller palette. I can cross-research and compare colors with what I have, so brand doesn't matter. Im just overwhelmed and need a starting point. Thank you!