1. pelagic—A: tree-dwelling. B: high-flying. C: inhabiting open seas.
2. incubate—A: keep eggs warm until they hatch. B: teach young to fly. C: find a mate.
3. keratin—A: young parrot. B: birdseed mix. C: fibrous protein.
—A: point binoculars below eye level. B: miss a sighting. C: revisit a birdwatching spot.