Mortimer is a pet bird that belongs to Kelsey. He Is a Budgerigar, a species of parakeet. He is a male, because on the blue cere above his beak. He is always seen atop Kelsey's head. Kelsey has had many other pet budgerigars, as seen in the pet cemetary scene in the pilot episode. Mortimer is also called 'trusty falcon' by Kelsey.