Ostrich
Ostrich eyes are indeed large (it is the biggest bird eye and even larger than that of many large mammals), and bigger than their brains but this does not make them stupid, however. it is not a case of an undersized brain but rather of oversized eyes. Bird brains are generally smaller than in mammals of the same body mass but this reflects the different emphases on sensory perception (such as vision) and the need to process this information. Ostrich brains may be small compared to the bird but they are more than adequate to allow the bird to sense and respond to the environment in a variety of sophisticated behaviours
