Xander, our rescued (abandoned in the snow!) Russian Tortoise bonks against the glass of his tank until someone takes him for an outing. Here he is, his usual disgruntled expression, exploring part of the garden. One thing owning a tortoise teaches you is to care for something that does not love you back.
I like him, however, and his commitment to being aloof and crotchety no matter what. Consistency has its virtues.