摘要：Occupations of nest cavities in a Monk Parakeet community nest by several House Sparrows are reported. Only male
sparrows were included in the aggressive behavior and attacked the larger parrots together. To the best of my knowledge,
the observed occupation behavior in the House Sparrow has not been reported previously. Furthermore, this is the first
observation of an aggressive occupation of nest cavities in a Monk Parakeet community nest by House Sparrows. The two
species are common and well studied, but there is no information about their direct competition by nesting places
