You might not be aware that there are several zoology-related databases that are all available for free to members of the university.
They include specific subject reference works, citation databases, image resources and a content alert database that will support you in your teaching and research.
I have created a guide to these and posted it on our Library Guides 
website here (along with many other guides that may be of interest and 
use to you): 
http://www.zoo.cam.ac.uk/library/guides.html The guide gives you instructions on how to access these databases, on and off-campus, as well as information on the content available.
To
 see the full range of subject databases available to you as a member of
 the university, please visit the University Library's 
eresources@cambridge website here: 
http://www.lib.cam.ac.uk/eresources/index.php
There is also a useful e-reference books here: 
http://www.lib.cam.ac.uk/ebooks/ereference.html
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| ArtStor |  |  |  | 
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| Birds of North America (BNA) Online | 
  
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| Journal Citation Reports (Web of Knowledge) | 
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| Oxford Reference Online | 
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| Proquest Dissertations & Theses A&I | 
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| ScienceDirect | 
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| Scopus | 
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| Web of Science (Web of Knowledge) | 
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| ZETOC: Electronic Table of Contents |