This blog has fantastic size comparisons of humans and various extinct birds (blog in Spanish). The one pictured is Argentavis, the largest flying bird ever known to have existed - found in Argentina. It is related to the Andean Condor.
Doedicurus was a relative of the modern armadillo with two exceptions. One, it was five feet tall and two, had a spiked tail club used for inter-species competition. Doedicurus lived until the end of the Pleistocene years ago