It will kill the lice in a few minutes. If you want to see how many are on him, dust him and place in a box on paper towels. Come back in 30 minutes.
Many species of lice, so very gently catch him and check his crop. If full of fluid, be sure not to invert him or put pressure on his crop. Apply dust to vent, under wings, legs, back and maybe some on his neck. Peafowl get head/ear lice, so I will apply a little dust to the head if I see them. I do this my making a small pile and placing a little "pinch" on each side of the head.
Thank you so much! you are amazing! I'm going to go powder him and his lady now.