| 11. | Australasian bitterns are endangered in both Australia and New Zealand.
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| 12. | Bitterns tend to have shorter necks and be more wary.
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| 13. | Bitterns tend to be shorter-necked and more wary.
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| 14. | Bitterns tend to be shorter-necked and more secretive.
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| 15. | The Bittern Line was not proposed for closure, and stayed open.
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| 16. | The Bittern design was based on a grid system plan.
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| 17. | The lake is a stronghold of the endangered Australasian bittern.
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| 18. | Bird species living on the site include the bearded tit and the bittern.
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| 19. | Bitterns tend to be shorter necked and more secretive.
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| 20. | Yellow bitterns feed on insects, fish and amphibians.
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