 This narrow color spectrum may render hummingbird-pollinated flowers relatively inconspicuous to most insects, thereby reducing nectar robbing.Hummingbird-pollinated flowers also produce relatively weak nectar (averaging 25% sugars w/w) containing a high proportion of sucrose, whereas insect-pollinated flowers typically produce more concentrated nectars dominated by fructose and glucose.Upon maturity, males of a particular species, "Phaethornis longirostris," the long-billed hermit, appear to be evolving a daggerlike weapon on the beak tip as a secondary sexual trait to defend mating areas.