Attributes / relations provided by
♦ ¹Ben-Dov, Y., Miller, D.R. & Gibson, G.A.P. ScaleNet 4 November 2009
♦ ²Comparative Ecology of Galapagos Ground Finches (Geospiza Gould): Evaluation of the Importance of Floristic Diversity and Interspecific Competition, Ian Abbott, L. K. Abbott, P. R. Grant, Ecological Monographs, Vol. 47, No. 2, (Spring, 1977), pp. 151-184
♦ ³del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ⁴Flower-visiting insects of the Galapagos Islands, McCullen, C. K. 1993. Pan-Pacific Entomologist 69:95-106