This video says about itself:
Speciation research on the Reunion gray white-eye (Zosterops borbonicus)
3 September 2013
A short introduction to our research into how the Reunion gray white-eye has diversified into different plumage forms in different parts of the small island of Reunion, in the South Indian Ocean. More information here.
From Ostrich: Journal of African Ornithology:
Population density of the Réunion Grey White-eye Zosterops borbonicus within the summit ecosystems of Réunion, Mascarene Islands
30 November 2015
Assessing population density is crucial for studying the ecology and evolutionary biology of species as well as for conservation purposes. Here we used point count methods to infer population density in a single-island endemic passerine bird, the Réunion Grey White-eye Zosterops borbonicus, that displays striking evidence of differentiation at a small spatial scale.
Population density was estimated at 5.17 birds ha−1 (CL 4.85–5.50), a value somewhat higher than previously believed. This estimation provides the first detailed estimation of bird population density in the vulnerable summit ecosystems of Réunion and will possibly allow a better understanding of the evolutionary causes of this plumage colour variation.
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