| The legs are strong for Procellariiformes, making them and the giant petrels the only members of that order which can walk well on land. |
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| The fulmars are in turn a member of the order Procellariiformes, and they all share certain identifying features. |
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| Albatrosses, along with all Procellariiformes, must excrete the salts they ingest in drinking sea water and eating marine invertebrates. |
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| This gland is inactive in species that do not require it, but in the Procellariiformes it acts as a salt gland. |
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| The tubes of all albatrosses are along the sides of the bill, unlike the rest of the Procellariiformes where the tubes run along the top of the bill. |
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| Like other Procellariiformes, they use their uniquely developed sense of smell to locate potential food sources, whereas most birds depend on eyesight. |
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| This oil is created in a stomach organ known as a proventriculus from digested prey items by most Procellariiformes, and gives them their distinctive musty smell. |
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