I don't speak German, so the website's no help, but from this poster, I assume Oro Verde is an educational foundation promoting children's awareness of the awesome array of diggers mankind uses to show the rain forest who's the boss.
"Diversity of Species in the Rainforest" by Oro Verde [eyeteeth via dt reader eric]
OroVerde - Die Tropenwaldstiftung [oroverde.de]
My kid would, of course, absolutely love that as a poster. He was out road-building before work this morning.