Some years ago, on a whim, I planted seeds for what the package said was a "Cardinal Climber." Unexpectedly it grew fairly well, to about 8 feet tall on my trellis; and for about 3 to 5 weeks the red flowers attracted about 5 (I think) hummingbirds for regular feeding.
While hummingbirds are not exactly rare in the area, they aren't often seen unless someone makes a deliberate effort to attract them to a good viewing site; and far more people try than are successful.
Since it was an annual plant I tried again, each of the succeeding 5 years, with fresh seed for the same plant; but could never get the *^@#!$ things to grow again.