The term 'small pigeon' can be described by two crossword solutions: 'dove' and 'SQUAB'. A dove is a type of bird that is typically smaller than other types of pigeons, and is known for its white feathers and gentle nature. SQUAB is a term used to describe a young pigeon, usually less than four weeks old, that has not yet developed its flight feathers. Both terms are used to describe small pigeons, although they have slightly different meanings.