Air sacs connected to lungs to supplement
respiration are present in :-
1. Aptenodytes and hemidactylus.
2.Pteropus and Aptenodytes.
3. Aptenodytes and Neophron.
4. Neophron and Pteropus
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3. Aptenodytes and Neophron
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3. Aptenodytes and Neophron.
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