Molecular phylogenetics and evolution NUMBER@1 -LRB- NUMBER@2 -RRB- NUMBER@3 NUMBER@4 PDF -RRB- is a medium-sized , approximately 61cm long , dark brown raptor in the family Accipitridae .

The PERSON@1 , Spizaetus bartelsi is a medium-sized , approximately 61cm long , dark brown raptor in the family Accipitridae .
