Only when they are RR powered.
I saw a slow motion video of the initial testing for this engine where the testers were propelling frozen chickens into the rotating fan to mimic this exact condition. The blades sliced the chickens up as neatly as a butcher with a machete. Thus, I don't think there will be any Chesley Sullenberger heroics needed by 777 pilots. :)
Only when they are RR powered.
Bird strikes per wiki (note that a Canada Goose can weigh up to 11 lbs):
http://en.wikipedia.org/wiki/Bird_strike
“The force of the impact on an aircraft depends on the weight of the animal and the speed difference and direction at the impact. The energy of the impact increases with the square of the speed difference. Hence a low-speed impact of a small bird on a car windshield causes relatively little damage. High speed impacts, as with jet aircraft, can cause considerable damage and even catastrophic failure to the vehicle. The energy of a 5 kg (11 lb) bird moving at a relative velocity of 275 km/h (171 mph) approximately equals the energy of a 100 kg (220 lb) weight dropped from a height of 15 metres (49 ft).”
“On September 22, 1995, a U.S. Air Force E-3 Sentry AWACS aircraft (Callsign Yukla 27, serial number 77-0354), crashed shortly after take off from Elmendorf AFB. The plane lost power to both port side engines after these engines ingested several Canada Geese during takeoff. The aircraft crashed about two miles (3 km) from the runway, killing all 24 crew members on board.”