Have a look at videos of jets blowing vans off the runway and you get an idea of how powerful the sucking is. A bird would get sucked through a chainlink fence

Have a look at videos of jets blowing vans off the runway and you get an idea of how powerful the sucking is. A bird would get sucked through a chainlink fence in front of the engine. Also you'd be reducing the efficiency of the engine all the time, which would add up over hundreds of trips.