How to prevent birds from entering a dryer vent?
I have installed a vent screen that looks almost exactly like the one you linked to. Mine had a plastic frame piece that screwed to the wall around the vent assembly. Then the screen part just snaps onto the sides of the frame with a snap. 

It can be easily removed for cleaning out accumulated lint by inserting a flat blade screw driver into a notch on either side. 

Yes the screen does catch some lint but I have rarely had to clean it more than once in 4 to 6 months. It really does depend upon several factors as to how often cleaning is required.


How often you run a load of laundry through the dryer
What types of things are being dryed
Whether you have a good lint screen in the dryer
Whether you make sure to clean the dryer screen each load
If there is any possible lint that falls off the dryer screen into the dryer innards whenever you pull it out for cleaning.