Yellow-rumped Cacique
In Panama and Trinidad south to
Peru, Bolivia and central Brazil
...song may incude mimicry.
Cacicus cela 
(L 8.5-9.25" Wt 2.12-3.67oz)
Canopy Camp 
Darien
03Oct2016
Andrew Spencer, XC32050
A bird watcher is casual; a birder
tends to be more obsessed…keeping a
list of all bird species seen since the
obsession began.
(Scott Shalaway)