...Although it has food preferences, the crow is euryphagous, and its dietis governed to a large extent by the availability of various types offood in its habitat... 
Dwight Platt 「Food of the Crow, Corvus brachyrhynchos Brehm, in South-central Kansas」
...The availability of suitable habitat brought on by the rainy season and the regular occurrence ofcenoteshelps to explain the presence of such species far outside the Rain Forest zone...
Erwin E. Klaas 「Summer Birds From the Yucatan Peninsula」
...In nine suchletters which discuss, among other things, the availability of timber,several kinds of trees are listed...
Henry S. Fitch 「The Forest Habitat of the University of Kansas Natural History Reservation」
...In Hume's case, therewas no ill-founded conclusion of the availability of thefreshly-discovered district...
Ernest Favenc 「The Explorers of Australia and their Life-work」
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