References

"13 Vampire Animals". Mother Nature Network. http://www.mnn.com/earth- matters/animals/photos/13-vampire-animals/vampire-finch

"BirdLife International "Geospiza difficilis". IUCN Red List of Threatened Species. Version 2012.1. International Union for Conservation of Nature.

Abbott, Ian, Abbott, L.K. Comparative Ecology of Galapagos Ground Finches  (Geospiza Gould): Evaluation of the Importance of Floristic Diversity and Interspecific Competition. Ecological Monographs , Vol. 47, No. 2 :151- 184

"ABC Natural History Unit - Islands of the Vampire". http://www.abc.net.au/nature/vampire/finches.htm

"Darwin and Wolf Islands". http://www.geo.cornell.edu/geology/GalapagosWWW/WolfDarwin.html

"Geospiza Difficilis Septentrionalis" . Encyclopedia of Life.  http://eol.org/pages/1244235/overview

Grant, P. R, Boag, P. T., and D. Schulter. A Bill Color Polymorphism in Young Darwin's Finches.The Auk , Vol. 96, No. 4 (1979):800-802
 

Grant, Peter R., B. Rosemary Grant, and Kenneth Petren. The Allopatric Phase of Speciation: The Sharp-Beaked Ground Finch (Geospiza difficilis) on the Galápagos Islands. Biological Journal of the Linnean Society Vol. 69.3 (2000): 287-317
 

"Instant Evolution Seen in Darwin's Finches. National Geographic Society".   http://news.nationalgeographic.com/news/2006/07/060714-evolution_2.html

"Introduction to the Aves". http://www.ucmp.berkeley.edu/diapsids/birds/birdintro.html

"ITIS Report: Geospiza". Integrated Taxonomic Information System
Lack, D. 1969. Subspecies and sympatry in Darwin’s finches. Evolution Vol. 23 :252-263

"Order Passeriformes". http://www.oiseaux-birds.com/page-intro-order- passeriformes.html

"Real Monstrosities: Vampire Finch". http://www.realmonstrosities.com/2011/10/vampire-finch.html

"The Role of Plume-Ridge Interaction in Magma Genesis II: Wolf Island,  Galapagos".http://adsabs.harvard.edu/abs/2002AGUFM.V61A1358B
 

"The Role of Plume-Ridge Interaction in Magma Genesis III: Darwin Island, Galapagos". http://adsabs.harvard.edu/abs/2002AGUFM.V61A1359R

Schluter, Dolph & Grant, Peter R. 1984. Ecological Correlates of Morphological  Evolution in a Darwin's Finch, Geospiza difficilis. Evolution , Vol. 38, No. 4 : 856-869

"Sharp-beaked Ground-finch (Geospiza Difficilis)."Sharp-beaked Ground-finch Videos, Photos and Facts. http://www.arkive.org/sharp-beaked-ground-finch/geospiza-difficilis/

"Tanagers Family Thraupidae." http://creagrus.home.montereybay.com/tanagers.html

"Vampire Finch." Wikipedia. Wikimedia Foundation, 11 Dec. 2012. http://en.wikipedia.org/wiki/Vampire_Finch

"Vampire Finches Aka Sharp-beaked Finches, Sharp-billed Ground Finches." http://www.avianweb.com/vampirefinches.html

"Virtual Galapagos: Wildlife - Darwin's Finches." http://www.doc.ic.ac.uk/~kpt/terraquest/galapagos/wildlife/island/finch.html

W. M. White 1997. A Brief Introduction to the Geology of the Galapagos. Cornell  University Earth and Atmospheric Sciences. 2011.

"Wolf Island, Galapagos Ecuador". http://www.ecostravel.com/en/ecuador/cities-destination/galapagos/wolf.php
 
 


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