In LIS they use trained falcons to scare the birds, and they are very effective on the job. You may not know this but all around the LIS airport there are literally hundreds of huts filled to the brim with pigeons used for races, sometimes extremely close to the airport fence. The owners of these birds are always setting the pigeons out to train them and sometimes all you can see is a cloud of feathers moving in circles, but in spite of this apparent chaotic scene the birds seem to know exactly where NOT to go, mostly because of the constant falcon patrol. Sometimes a trespassing (and expensive) racing pigeon has to fall at their claws for others to remember where the border is. Even migratory birds seem to avoid LIS airspace.
The only problem that arises with this solution is when some other type of small eagle (sorry don't know the exact name for it) engage the falcons in a territorial fight for food. Sometimes they come home like they really went trough a turbine,
but they're tough little buggers.
GD&L
