Little brown bird

Informal name used by birdwatchers

Little brown bird (LBB) or little brown job (LBJ) is an informal name used by birdwatchers for any of the large number of species of small brown passerine birds, many of which are notoriously difficult to distinguish. This is especially true for females of species which show sexual dimorphism, which may lack much of the differentiating colouring present in males.

This keyword could refer to multiple things. Here are some suggestions: