...Boobies (Pelecanus sula), gulls, petrels, and men- of-war birds (P... 
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2」
...
—But for the vigorous and long-continued efforts of the Audubon Societies, I think our coasts would by this time have been swept clean of the gulls and terns that now adorn it...
William T. Hornaday 「Our Vanishing Wild Life」
...Apowerful bird that preys upon the smaller Gulls and also devours the youngand eggs of smaller birds...
Chester A. Reed 「The Bird Book」
...Theyare very rapacious birds and live to a great extent,especially during the breeding season, upon the eggs and young of otherbirds such as Ducks, Murres and smaller Gulls...
Chester A. Reed 「The Bird Book」
...This bird, which is the most southerly distributedof the larger Gulls is twenty-four inches inlength...
Chester A. Reed 「The Bird Book」
...The make-up and plumage of the whole bird ismore like that of the Gulls than any of the others...
Chester A. Reed 「The Bird Book」
...Or I might even say that the originalimage has been covered by the later one, as in thecase of the laughter-like cries of the Dominican andthe black-backed gulls...
W. H. Hudson 「Birds and Man」
...A wise man once said "the beautiful is as useful as the useful," butthe picturesque gulls are not preserved merely to enliven marinepictures and to please the eye of travellers...
Neltje Blanchan 「Birds Every Child Should Know」
...Not many years ago gulls became alarmingly scarce...
Neltje Blanchan 「Birds Every Child Should Know」
...The young of all the Gulls and Terns are born covered with downand can leave the nest a few hours after birth...
Frank M. Chapman 「Color Key to North American Birds」
...The Fulmars, (genus Fulmarus), are northern birds and nest in immensenumbers on isolated islets, somewhat like certain Gulls...
Frank M. Chapman 「Color Key to North American Birds」
...These flocks seen from a distance resembled flocks of gulls on the surface of the sea...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The three gulls rose up simultaneously and floated over her and then away, leaving her standing on the spot, shaking her head in anger and disgust at their escape...
W. H. Hudson 「Birds in Town and Village」
... "I understand," said she, "that in manyplaces down on the New Jersey coast the boatmen have given up fishing,as they can make so much more money killing terns and gulls for women'suse...
Virginia Sharpe Patterson 「Dickey Downy」
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