What distinguishes the underparts of a young Mississippi Kite?
Answer
Dark streaking or spotting across their breasts and bellies
A critical field mark for the juvenile is the presence of dark streaking or spotting across the breast and belly, whereas adults are mostly plain gray below.

Related Questions
What is the general body coloration of a juvenile Mississippi Kite?What distinguishes the underparts of a young Mississippi Kite?How is the tail coloration of an adult Mississippi Kite typically described?Regarding the tail, what specific difference indicates a juvenile Mississippi Kite?What color is the cere of a mature Mississippi Kite?Which color characterizes the cere of a juvenile Mississippi Kite?Which flight characteristic is retained by the juvenile Mississippi Kite, similar to the adult?Approximately how long does a Mississippi Kite wear its distinct brownish, immature plumage?According to the systematic checklist, what dark facial feature confirms juvenile status?Due to its streaking, what bird might a juvenile Mississippi Kite be confused with in the field?