Grounded swifts are a common wildlife casualty in the UK — found unable to take off from flat ground, they require correct assessment and handling to determine whether they need rehabilitation or simply a release launch.
Swifts kept on the ground stress rapidly — their physiology is entirely adapted to aerial life. Unnecessary handling causes wing and feather damage. Injured or sick swifts require assessment by experienced rehabilitators and specialist care. Premature fledglings cannot yet fly properly and require specialist foster care by trained swift rehabilitators until they can be released. Incorrect release of injured swifts results in immediate grounding and death from predation or exhaustion. The window for launching healthy adult swifts is brief — delay increases stress and risk.