Martens! Because they are just amazing animals and I love them dearly (and rereading Inkheart fuelled my love further, that book is the reason I became interested in them in the first place). Top and bottom ones are Pine martens, the middle one is a beech marten (same species as Esben). I dunno why, but I felt the urge to draw these patterns on their tails, and I love how it looks! Will play with that some more, maybe even give Esben such patterns :D The tail of the first marten was just begging for some stylised decoration and of course I could not leave the other tails undecorated. This was a lot of fun to do! Really loved working on them!