Please capitalize where necessary: photo collection: birds. photos of birds.
A: Photo collection: Birds. Photos of birds.

Please capitalize where necessary: the payout is 30-to-1.
A: The payout is 30-to-1.

Please capitalize where necessary: maximum 620 per year (depends on income)
A: Maximum 620 per year (depends on income)

Please capitalize where necessary: another revision : new words added in " green ".
A:
Another revision : New words added in " green ".