The amount of space that a helicopter needs to safely pull someone up from above the jungle canopy will depend on a variety of factors, including the size and type of helicopter, the size and weight of the person being rescued, and the specific conditions and terrain of the area. In general, however, a helicopter will need a relatively large area of clear, open space in order to perform a rescue operation. This is because the helicopter will need room to maneuver and hover while the rescue is being conducted, and will also need to be able to land and take off safely.
As a rough estimate, a helicopter may need an area of around 50 meters (164 feet) in diameter in order to perform a rescue operation safely. However, this can vary significantly depending on the specific circumstances, and it is important to follow the guidance of the helicopter crew and other trained professionals when conducting a rescue operation.