Usual and customary tips for meals are included in the price for international tours. Tipping of birding guides, drivers, boatmen, etc. is expected and not included in the tour/workshop price. The amount of tip is discretionary. Guidelines for tipping are around $10-12/day for the birding guide, $7-10/day for the driver, and a few dollars for boat operators, maids, bartenders, etc. depending on performance. If the guide also drives, he should be tipped at the high end of the range. Tips on Galapagos tours are generally for the entire crew.