I was just reading the links I gave you. They are all helpful. The last one has the best advice. The first one says NOT to feed any baby birds...
"If the parent does not return within 1 hour to the nest or 2 hours to the baby on the ground, and you decide to take responsibility for the young bird, it is important to get it to a licensed wildlife rehabilitator as soon as possible. They are permitted by the Florida Game and Fresh Water Fish Commission and U.S. Fish and Wildlife Service to provide care for wildlife. Keep the bird in a warm, dark and quiet place where they can't move around much, such as a small box and don't attempt to feed it
. " http://www.tc.umn.edu/%7Edevo0028/advice3.htm
What ever you decide to do, first thing in the morning contact the Wildlife rescue group. Infact, I would not delay, some places have a 24 hour help line. I would do a bit of reaserch and get a number, you never know you may be able to talk to someone tonight to help get you through untill the morning.
I found these links for you to call in the morning.http://www.albertabirds.com/wildwest/WEAMS.htm
for this one scroll down a bit and you will get to the Canada section. Its a list of all the orginizations.http://www.tc.umn.edu/~devo0028/contactI.htm