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<references>
<ref name = "COL">{{cite web |url= http://www.catalogueoflife.org/servicesannual-checklist/res2011/2011AC_26July.zipsearch/all/key/piciformes/match/1|title= Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist.|author= Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.)|year= 2011|publisher= Species 2000: Reading, UK.|accessdate= 24 september 2012}}</ref>
</references>
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