The uniformity of the holes look to be sapsucker (woodpecker) damage:
http://www.ppdl.purdue.edu/ppdl/week...8-20-01-1.html

Suzy, Zone 5, Wisconsin

"Jimi" wrote in message
...
Hello ...I posted 4 photos seen here of a Skotch pine tree. I then have
three photos of trunk infestation. I live in Southern Saskatchewan Canada
(close to the montanna border) . The tree apears very healthy, however the
holes in the tree have me concerned... Any ideas on what this is and how
to combat it would be a great help. Thank you all for any positive
responses..

Here are the photos:

http://ca.pg.photos.yahoo.com/ph/pip.../ph//my_photos