Very important are also the investigations which show how, for instance in such fundamentally different groups as petrels and gulls, similar bionomic conditions have produced step by step a marvellously close convergence, not only in general appearance, but even in many details of structure. [Please select]
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Under the name of 'Mother Carey's Chickens' the Petrels must be known to all readers of voyages.' [Please select]
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In reality, the Petrels are scarcely birds of the day; they love to hide themselves in holes and behind stones. [Please select]
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Storm-Petrels are gregarious birds; they breed in colonies, and skim the sea in small flocks. [Please select]
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They are stormy petrels, and are supposed to go out over the seas and show good birds the way home. [Please select]
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Pray give my regards to your mother, whom I envy, and all the "stormy petrels," whom I envy too. [Please select]
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The three southern Diving Petrels, forming the next family, are much smaller than the common Petrels. [Please select]
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They do not skim over the waves like Petrels, but show a heavy, labored flight, varied by a short soar. [Please select]
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Flying fish skimmed the water like thick spray; petrels were so few that I could count them; another shark swam round me for an hour. [Please select]
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So the good-natured petrels said that they would show him part of the way themselves, but they were only going as far as Jan Mayen's Land; and after that he must shift for himself. [Please select]
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