Nobody said there'd be birdseed
Seed is a symbol of fruitfulness. Psalm 127:3-5
3Lo, children [are] an heritage of the LORD:
The fruit of the womb [is his] reward.
4As arrows [are] in the hand of a mighty man;
So [are] children of the youth.
5Happy [is] the man that hath his quiver full of them:
They shall not be ashamed, but they shall speak with the enemies in the gate.