Mechanics
I've moved to making maps using Foundry VTT. It has a lot of nice features, not least that all necessary information is collected in one place - saves me tons of time looking thing up. But sadly there is one major feature lacking: Map coordinates. It is meant to be used in real time, and apparently nobody (with programming skills and a lot of free time on their hands) has thought of adding map coordinates to make them more usable in PbP (can't blame them - the system seems to have amazing properties for life gameplay, so PbP seems a bit tame in comparison). Anyway, I hope we can make do without coordinates, though I acknowledge that it requires a bit more detailed explanation on your part to describe movements.
Terrain:
Unlike other parts of the jungle, everything in this map is characterised as swamp terrain. The parts that appear to be "dry" land is still difficult terrain. The wet parts are (at best) greater difficult terrain (assuming it is shallow enough to wade through).
Map