There are currently 0 users and 30 guests online.
Add new comment
Ancient DNA Provides New Insights into the Evolutionary History of New Zealand's Extinct Giant Eagle
From PLoS Biology:
Prior to human settlement 700 years ago New Zealand had no terrestrial mammalsÃ¢â?¬"apart from three species of batsÃ¢â?¬"instead, approximately 250 avian species dominated the ecosystem. At the top of the food chain was the extinct Haast's eagle, Harpagornis moorei. H. moorei (10Ã¢â?¬"15 kg; 2Ã¢â?¬"3 m wingspan) was 30%Ã¢â?¬"40% heavier than the largest extant eagle (the harpy eagle, Harpia harpyja), and hunted moa up to 15 times its weight. In a dramatic example of morphological plasticity and rapid size increase, we show that the H. moorei was very closely related to one of the world's smallest extant eagles, which is one-tenth its mass. This spectacular evolutionary change illustrates the potential speed of size alteration within lineages of vertebrates, especially in island ecosystems.
The Barcode of Life
The Genealogical World of Phylogenetic Networks
BMC Evolutionary Biology