Herman Smith first showed me this bird by calling it with a whistling sound like,"Pur-wť eeer." or more like "Pur-Pur..Pur-we'eer". It came right to him. We have a mosquito eating bird on Ambergris known as a pauraque. most people never see it because it flys predawn and dusk and looks like a bat when it flys. during the day it sleeps on the ground in the open but uses advanced camouflage techniques . eats thousands of mosquitoes a day and flys though the air with its mouth open funneling them in with specialized whiskers.
They don't need training and work for what it can eat, we just need more of them.