You should see the trees
I spent some time in Peru way back in the jungle. In fact we were so far into the jungle that they had to pump air back there, or so it seemed. I was about 90 miles from Iquitoes which is the largest city in the world that you can't get to by vehicle. Access is only by airplane, or coming up the Amazon from the Atlantic aprox. 3000 miles. Anyway the trees are huge, I saw some that I believe were over 10 feet across, much more at the root base. Some of the stumps from long ago logging were even bigger. Most of the wood is very hard, mostly mahogany, and it is heavy. I saw some logging going on, but not much from the river, it is now mostly back away from the river. I was on a tributary of the Amazon called the Tahuayo, and went up the river as far as possible before it got to narrow to turn the boat around. Had to lay in the bottom of the boat in order to get under several logs which had fallen across the river, they were 2-3 footers and the guide couldn't cut them with a machete. It would take a real grunter of a saw to fell the trees I saw, but it had obviously been done in areas, and long ago to.