The airport will be able to confirm a flight if someone calls and provides the flight number. The information can be obtained through email, however, calling is the quickest and best way to confirm the flight.
Groups of birds in general are called a flight (when in the air) or a flock (when on the ground). The previous contributor said, you can call it a clan of toucans, but I haven't been able to confirm this.
Air Canada offers both telephone and online confirmation of all flights. In addition, if one has a mobile number on file with Air Canada, a call or text message can be automatically sent in order to confirm any and all flight details.
If you go to an airlines website and look up flights from Hong Kong to Beijing, it will tell you how long the flight will be. Don't worry, you don't have to pay any money, or confirm anything to view this information. Hong Kong (HKG) to Beijing (BJS) Shortest Flight Duration 3 hours 0 mins