feel free to use for whatever but pls keep my signature visible ^__^!
here's the approximate brush settings used for the lineart in case you want to make any edits-- i messed around with the scattering number a little bit throughout but it stayed in that ballpark, & the size was 3 for the main lines and 2 for the detail:

(pen tool)
i made some quick example markings based on the giant anteater if you wanted something really easy to recolor but i encourage you to delete them and draw your own!