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All answers having "Parrots" as clue:

4 Character Answers:

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APES

ARAS

KEAS



5 Character Answers:

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APERS

KAKAS



6 Character Answers:

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ECHOES

MACAWS



7 Character Answers:

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REPEATS



8 Character Answers:

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GRASSIES

IMITATES



9 Character Answers:

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REPEATERS



11 Character Answers:

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BUDGERIGARS