Bobmac, Maryann has pretty much nailed it...although, you can easily omit the hassle of making/adding simple syrup, and just add a bit more Tia or Rum Cream(very sweet)...I've seen them made with/without actual rum...but always make them with myself, for a stronger booze component.....Dirty Banana vs. Hummingbird is really just a color preference(subtle flavor diff)...have always seen a "strawberry syrup" added to the hummingbirds, but can't really find one in the states....what I did was get some grenadine, and mccormick strawberry extract, and pour/mix it into the grenadine bottle....works good ..enjoy