5 Letters

BILLS (short to better peck at seeds & insects)

FIELD (habitat)

QUAIL

SEEDS (food)

SHORT (wings & flights)

STRUT (males' fancy moves to attract females)

6 Letters

GROUSE

LARGER (most males)

TURKEY

WINTER (adapted to live in cold climates)

7 Letters

FORESTS (habitat)

INSECTS (prey)

RUNNERS

8 Letters

BOBWHITE

COLORFUL

FLUFFING (males' fancy moves to attract females)

GAMEBIRDS

9 Letters

COURTSHIP (males' fancy moves to attract females)

DELICIOUS

10 Letters

GALLIFORME