It was a battle of two of the game's top netminders, with Anaheim's John Gibson turning in a 24-save performance and Carey Price stopping 35 of 37 for Montreal.
In the end, a lack of coverage on Petry as he entered the offensive zone proved costly for the Ducks, who were looking to win their third in a row for the first time since the first three games of the season.
"It's always good to get a point, but we should've had the second one," said Ducks center Derek Grant, who scored his 12th goal of the season in the opening minutes of the third period tonight. "It stings. We played well, but made a couple mistakes that keep us from winning games. It's something we have to fix."
The Canadiens opened the scoring with 2:42 remaining in the first period when 20-year-old center Nick Suzuki found the back of the net with a seeing-eye snap shot for his 11th goal of the season.
The Ducks evened the score midway through the middle frame when Jakob Silfverberg buried a nice feed from Rickard Rakell for his 16th goal of the season. The goal ended an eight-game drought for the veteran right wing. With the assist, Rakell extended his point streak to four games (1g/4a).