Evolutionary reason for massive difference in size between male and female giant moa revealed

[PhysOrg]

Some of the largest female birds in the world were almost twice as big as their male mates. Research carried out by the Zoological Society of London (ZSL) shows that this amazing size difference in giant moa was not due to any specific environmental factors, but evolved simply as a result of scaling-up of smaller differences in male and female body size shown by their smaller-bodied ancestors.

 

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[ScienceDaily]

The evolutionary reason for the massive difference in size between male and female giant moa -- the extinct giant birds of New Zealand -- has been revealed for the first time.

 

Read the full article on ScienceDaily