This video says about itself:
7 February 2018
New experiments show that dominant male Long-billed Hermits have better spatial memories and sing more consistent songs than less successful males, according to research published in the journal Scientific Reports.
From the Cornell Lab of Ornithology in the USA today:
It’s Brains Over Brawn for Male Long-billed Hermits Seeking Mates
In the glitzy world of hummingbirds, one species seems to profit more from mental prowess than physical flamboyance. For male Long-billed Hermits in Costa Rica, having a good spatial memory is a key factor in winning prime display spots. See the full story here.