The Sparrow as a Christian Symbol represents and symbolizes the concern of God for the most insignificant living things.
The Easton Bible Dictionary provides the following definition, meaning and emblem for the Sparrow Christian Symbol in the Bible.
Mentioned among the offerings made by the very poor.
Two sparrows were sold for a farthing (Matt. 10:29), and five for two farthings (Luke 12:6).
The Hebrew word is 'tsippor', which properly denotes the whole family of small birds which feed on grain (Lev. 14:4; Ps. 84:3; 102:7).
The Greek word of the New Testament is 'strouthion' (Matt. 10:29-31).