I have a few falconer friends that are also into behavior in raptors and have spent some time playing with that aspect, that is behavior. It is not uncommon for them when discussing some behavior to start the conversation with the comment, "I hate to be anthropomorphic but I have a hard time describing it otherwise" So when one comes to realize that they know what it means to be anthropomorphic, one starts to forgive them for describing their observations in anthropomorphic terminology. So we all know a stupid bird is incapable of finding joy or exuberance in anything but we will express it in those terms as if the bird enjoyed sailing around or screaming or any thing that it does because we know our fellow falconers will understand what we are talking about.