James heard the whistle but he still had the rifle drawn out of reflex. Steve asked a question that honestly needed to be brought up and he wanted to see what Natasha noticed. HYDRA troopers ahead of them, Black Talon mercs behind them and a jungle full of God knows what in between them...nothing they couldn't handle.
It was probably a good idea for Steel to be scouting while he still had the daylight. Bucky couldn't remember the last time he had sniper support - usually if there were snipers involved in ops they were a hazard that needed to be avoided or neutralized. While they waited Buck put the black face paint on and them attached the mask and goggles flipping the latter up until it was time to go.