As written in scripture, the tiny mustard seed has produced a tree, where the birds of the air can come and take rest. We are able to see the small beginning of this tree -- below in the fertile ground is the tiny mustard seed. All the birds taking rest are birds of the Bible. Sacrificial birds are the sparrow, swallow, pigeon, and the two turtledoves which Mary sacrificed to God after giving birth to Jesus. The white dove is symbolic of the Holy Spirit. Quail, representing the quail God sent to the Israelites as they wandered in the wilderness with Moses -- headed to the promised land, and the raven, symbolic of the raven God sent to feed Elijah as he sat under the Juniper tree. Notice the birds among the bottom branches represent Old Testament, the birds among the upper branches New Testament. This placement refers to the fact, the Old Testament came first, birthing the New Testament. The Old Testament foretells of Christ, New Testament fulfills this -- Christ is born resulting in a new covenant. The mustard tree is in bloom, its branches intertwined form a cross, with the white dove -- the Holy Spirit, at its center. This tree is watered by "living water"!