Related Clues:

• One bird eaten by another one
• Part of viva voce treating ornithological specimen
• Wading bird sacred to the Egyptians
• It's a bird, I repeat!
• See boss, half cut, following one leggy bird
• One bird or another crossing river with duck
• On a lake, this wader would provide proofs of whereabouts
• State of central US, capital Lincoln
• Rook and duck protected by another bird — and another
• Bird, one spotted to west of British Isles
• Current encore that may be sacred?
• One bird (rook, oddly) flew into another
• Slowly discharge
• Rook and duck concealed by another bird — and another
• I do it again for the bird