Definition and Classification:
In the Bible, "flying birds" are often mentioned as part of God's creation, symbolizing freedom, divine provision, and the vastness of God's creative work. The term encompasses a variety of avian species that are capable of flight, and they are frequently referenced in both literal and metaphorical contexts throughout the Scriptures.

Creation and Purpose:
Flying birds were created by God on the fifth day of creation, as recorded in Genesis 1:20-22 : "And God said, 'Let the waters teem with living creatures, and let birds fly above the earth in the open expanse of the sky.' So God created the great sea creatures and every living thing that moves, with which the waters teemed, according to their kinds, and every bird of flight according to its kind. And God saw that it was good." This passage highlights the intentional design and diversity of avian life, emphasizing their role in the ecosystem and their beauty as part of God's good creation.

Symbolism and Significance:
Flying birds often symbolize freedom and transcendence, as they move effortlessly through the skies. In the Bible, they are also used to illustrate God's care and provision. For instance, in Matthew 6:26 , Jesus teaches about God's provision: "Look at the birds of the air: They do not sow or reap or gather into barns—and yet your Heavenly Father feeds them. Are you not much more valuable than they?" This passage underscores the trustworthiness of God in providing for His creation, encouraging believers to rely on Him for their needs.

Dietary Laws and Sacrifices:
In the Mosaic Law, certain flying birds were deemed clean or unclean, affecting their suitability for consumption. Leviticus 11:13-19 lists unclean birds, which include the eagle, vulture, and raven, among others. These dietary laws were part of the broader covenantal relationship between God and Israel, setting them apart as a holy nation.

Additionally, birds played a role in sacrificial practices. For example, in Leviticus 1:14-17 , a bird offering, such as a dove or a young pigeon, was acceptable for burnt offerings, particularly for those who could not afford larger animals. This provision allowed all Israelites, regardless of economic status, to participate in worship and atonement rituals.

Metaphorical Uses:
Flying birds are used metaphorically in various biblical passages to convey spiritual truths. In Isaiah 40:31 , the prophet writes, "But those who wait upon the LORD will renew their strength; they will mount up with wings like eagles; they will run and not grow weary; they will walk and not faint." Here, the eagle's flight symbolizes renewed strength and divine empowerment for those who trust in God.

Judgment and Prophecy:
Birds are sometimes depicted as agents of judgment or as symbols in prophetic literature. In Revelation 19:17-18 , an angel calls birds to gather for the "great supper of God," where they will consume the flesh of those defeated in the final battle. This imagery serves to illustrate the completeness of God's victory over evil.

Conclusion:
Flying birds in the Bible serve as a testament to God's creative power, His provision, and His sovereignty. They are woven into the fabric of biblical narrative and law, offering insights into the relationship between God and His creation. Through their presence, believers are reminded of the beauty and order of God's world and the assurance of His care.