
1) Extinct flightless bird
Found on
https://www.crosswordclues.com/clue/mesembriornis

Mesembriornis is a genus of intermediate-sized phorusrhacids that grew up to 1.5 metres in height. They represent a well-distinct lineage of terror birds, differing from the massive large groups and the smaller Psilopterinae. In general proportions, they most resembled the Patagornithinae which flourished somewhat earlier, mainly to the south of t...
Found on
http://en.wikipedia.org/wiki/Mesembriornis
No exact match found.