“Hey, there are tulips up here!” my friend Jan Klomp hollered from above, his blue climbing overalls barely visible through the canopy foliage of the 35-m-tall tree he had just ascended. We write October 23, 1985. Earlier in the morning Jan and I had entered a 2-ha fragment of forest in the heart of Colombian coff ee zone, at an altitude of 1725 m (N 4056’, W 75042’). After a restless night in our sleeping bags, spread out on the unyielding fl oor of a traditional coff ee fi nca adjacent to the patch of forest, we were ready to get going. Admiring the play of light in dissipating dew on leaves, we were taking advantage of the relatively cool and clear weather at this time of the day, knowing that around midday it would get hot and buggy, followed by downpours. We were anxious to get as much work done as possible before that.