So is this great and wide sea, wherein are things creeping innumerable, both small and great beasts. 26 There go the ships: there is that leviathan, whom thou hast made to play therein. 27 These wait all upon thee; that thou mayest give them their meat in due season. 28 That thou givest them they gather: thou openest thine hand, they are filled with good. 29 Thou hidest thy face, they are troubled: thou takest away their breath, they die, and return to their dust. 30 Thou sendest forth thy spirit, they are created: and thou renewest the face of the earth.
Psalms 104:25-30 (KJV)
God placed everything in their positions to give glory to Himself. As people, we were also placed here to bring Him praise. But God loves us so much that He gave us a choice. As for birds, they don't have a choice. It's in their anatomy to sing for God. As for us humans, we were given free will to choose whether we will glorify Him or not.
Let's make the wise choice - and that is to bring praise to our Creator - Lord over all the earth.