I saw a local controller depart a 747 off 07R at HKG,with a 777 tyre carcass on the runway.''Caution there is da debris on da runway,cleared take off''
was the exact phrase.I was Tower co-ordinator and was screeming at him NO.
They looked at me as if I was an idiot.In those days at CLK,you got suspended for any go-around,your fault or not.Don't know what it's like now,but it was the most dangerous thing I'd seen in 25 years.
As far as runway birdkills,I give the option,but if it's something like a fox,I'd send them around.
In HKG they'd scrape it off and get the Wok out.