As a pilot, there might be a warning, but it's rather useless as, for example, at my airport there is a warning 365 days a year of geese. Can't stop flying for 365 days a year.
And even with the warning, there is little I can do. During the day you might see some birds on the runway or in the departure path and delay the takeoff a bit or maybe alter the flight path a teeny amount to try and miss the flock, but that's it and at night, what you can't see, you can't avoid.
Furthermore, I highly doubtt groundbased scare tactics are very useful besides shooting fireworks to get them to relocate 10 meters to the left.
So I'm afraid the news isn't as positive as you were hoping for, but the chance another one of those things happening are rather small. Over the 20 plus years I have, unfortunately, killed quite a few birds and other flying things, but never with the core of an engine, let alone both at the same time.