Note: This does not take travel to/from the airport into account.
The Wikipedia page on aviation safety has a nice table with deaths per journey, time and distance (based on data from the UK between 1990 and 2000):
Car: 40 deaths per billion journeys, 3.1 deaths per billion km
Aircraft: 117 deaths per billion journeys, 0.05 deaths per billion km
According to ICAO, a preliminary report must be released after a year. There is no hard timeline for the full report:
What are a State’s reporting obligations during and after an aircraft accident investigation?
Under Annex 13 to the Chicago Convention, States in charge of an investigation must submit a Preliminary Report to ICAO within thirty days ...
Don't forget the fact that if they were flying to another country (or maybe the bird originated from another country) there could be issues of Bird Flu spreading around. Killing it would be very unhygienic and could spread disease etc through the air con system. Also the crew could become ill if the bird dropped its guts all over the place.
Turning back to ...