Marshall (1942) Arinophula ruficanda Lake Olomega - abundant but only where patches of brush stand out in open fields of grassland or edge these fields on SW corners of lake. 8 or more birds together in one patch dry brush very noisy hard to approach. Were in same brush piles with Mourcocos + Colins but not green brush near water but where Synallaxis was. Long rachety calls distinctive. Chilata Dry brush patches along fences edge dry fields on level ground. Several birds together usually or else a pair ? & ?. Only around cultivated flat sunny fields. Not where trees. Volatinia jacarina Lake Olomega Great flocks several hundred birds mixed with seed-eaters in grassland & wet grass at edge lake. Fly to brush patches when disturbed. Perch on grass stems or drop on ground. Usually only in not open country V de Santa Ana Common brush summit Jeco (6500 ft) & bushy gutches where E allbigularis found. Chilata Common in plowed field and grassy areas.