I wasn't there neither, but consider what you would do if there was a large piece of known F.O.D. on the aircraft, runway, or taxiway. Would you be happy to run the thrust levers up knowing that there would be a good chance for FOD ingestion upon application of power?
What if the bird was on top of the fuselage where no passenger nor crew could have seen it? What if this happened at night, or IMC?
I wasn't there but are you suggesting that we delay every take off when you see or are informed of birds either side of the runway or taxiway?