Bird house advice needed

[mauve]

Hi
we have just moved to a new apartment
which is located very close to Humber river in Etobicoke.
I am delighted to hear birds sing every day right by
our window. With that, I thought of building
a bird house to put on the balcony.
I want to do it right. But for what particular
species should I aim and what to consider, I am not
sure. I would really apreciate informed advice and links to info.
Thank you.

[Scott]

I think the one thing to avoid with houses is attracting House Sparrows.  To help prevent House Sparrows moving in, get a bird house with an opening hole less than 1.25" and without a perch.  Chickadees, Nuthatches & Wrens  will fit into the smaller openings.

[Anonymous]

Link below to the ones that I made which have been working well for chickadees.

http://outdoorontario.net/birds/phpBB/v ... ttila#4085