The Yellow-breasted Boatbill (Machaerirhynchus flaviventer) is a flycatcher with a distinctively shaped broad, flat bill.
And here is a male:
Once you recognize their call, it is relatively easy to locate them. Here in our more open forest they often call from lower branches, so they are easier to observe than in dense rainforest.
We had some good sightings of tree-kangaroos, too:This female stretched out for Acacia leaves, then she and her joey made their way into a Cissus vine.