Another popular tattoo at the moment are black and grey animals with a touch of realism. This bear and cub tattooed to represent a father and sone was tattooed in a one day sitting.
If you are looking for great wildlife reference then why not google black and white nature photography? There is a wealth of unused reference online.
Whatever your choice, there are a lot of great reference images that I am more than happy to do. So, if you are looking for a Bear tattoo all you need to do is get in touch and we can take it from there.