The simple way to determine which species of hummingbirds pollinate which species of lilies is to compare their geographic ranges. As others have pointed out, there are widely available maps of where hummingbirds go in North America. If you want an online source, try http://www.allaboutbirds.org/guide/browse/38,15/ Kathleen PNW coast, where it’s hot (for us) and dry, dry, dry