| 1. | A 2008 study suggests that this family belongs to the Pelecaniformes.
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| 2. | The Sulae were traditionally included in the Pelecaniformes in its obsolete paraphyletic circumscription.
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| 3. | Like other birds in the order Pelecaniformes, they have four webbed toes.
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| 4. | Of those apparently basal taxa, the following show some similarities to the traditional Pelecaniformes:
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| 5. | Their feet are four-toed and webbed, a distinguishing feature among the Pelecaniformes order
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| 6. | Aequornithes includes the clades Gaviiformes, Sphenisciformes, Procellariiformes, Ciconiiformes, Suliformes and Pelecaniformes.
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| 7. | Their feet are four-toed and webbed, a distinguishing feature among the Pelecaniformes order.
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| 8. | Their feet are four-toed and webbed, a distinguishing feature of the Pelecaniformes order.
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| 9. | As with other members of the order Pelecaniformes, they have webbed feet with four toes.
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| 10. | This is a "'list of Pelecaniformes species by global population " '.
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