Sorry to say but even if this photo challenge is about trees you will not see many leaves. :)
Entry 1: a fern species of the genus Platycerium growing on the stem of a tropical tree. These kind of plants are epiphytic.
Entry 2: big tropical tree Canarium decumanum, whose buttress roots are much higher than my wife.
Entry 3: what is this strange brown "animal" on the stem of the tree? It is not one animal but many: swarming tropical wild bees ...
