Marshall, 1945 Calau Nysiaza oceanica 45. conspicuous. Much of feeding is done in crown foliage of medium-sized trees, where they hop among the twigs & also fly out after insects. When returning to a perch they quiver the tail like an Empidonax. Upright posture - often perches on exposed twig in Tyrannid fashion. Fixed territories - small area - a few adj. trees. This bird a powerful flyer, flier, seen to advantage when going over water - from one mangrove to another. Straight and rapid. More universal than H. chloris in habitat tolerance - except absent from open country - fields, etc.