Duval, E.H. 2004 Journal Isla Boca Brava, Chiriqui Prov., Panama 2 April 2004 I started the day by [illegible] bleeding the chicks in nest E-3 in a gully East of OCV. As I finished bleeding the second chick, BOV (scre) mobbed me aggressively. During a watch at EDM I noticed a flock of Down-whistling females mobbing a Mangrove Cuckoo near nest E-6. I've seen many mangrove cuckoos lately, and they forage low in the vegetation - they could be significant nest predators. I watched an unbanded green-plumage female construct a nest in the early stage, at EDM - she was breaking off chunks of leaf and then dropping them, about 15 feet from her nest site. She eventually settled on a chunk slightly smaller than her head. She flew to her nest fork (which I hadn't noticed before) and "tested" it, squatting in the fork with both feet clutching one of the branches. She then dropped the leaf chunk in the fork where it hung in spider webs which she had already arranged. She "tested" the site again, and the leaf piece fell to the ground.