discouraged if sparrow or starling nests need to be removed repeatedly. You will
discourage them. You will win.
Males returning to
formerly occupied homes immediately renew their claim.
The female selects
the room and both female and male build the nest two or three weeks
fight over already claimed rooms although the first claim usually
provides enough steadfastness to overcome intruders.
Martins need care. It's a job. Telescoping poles, door
stops, starling resistant entrances and removable nest trays make the
chores much easier. Easier means less likely to cause damage,
quicker, safer, and reduced burden means the landlord is more likely to
continue good responsible practice.
Metal poles, pole guards help prevent predators from climbing poles.