These are old photos. I have added them because there is no photo from Quebec. I've recently read that although this spider is common in many places it is not common in Quebec with a first sighting reported in 2013 http://www.erudit.org/revue/natcan/2013/v137/n1/1013187ar.html?vue=resume

This image is from 2010 so I hadn't realized how lucky I had been! The article says the first specimen in Quebec was found in 2005, and suggests the some arrived in Quebec in trucks from Minnesota (why Minnesota specifically and not other States wasn't clear).

The colour changes in development of Phidippus audax have been studied in the paper cited below (which is available free on the internet). According to this study the young immature spiders have white markings, later immature stages have the orange markings but the fully mature adults regain the white markings.
According to the paper:-
“The color change of the abdominal markings from white to red was apparently characteristic of the antepenultimate and the penultimate instars . Thirty two percent of the spiderlings showed the change in their seventh instar, 35% in the eighth, and 20% in the ninth. The change occurred in spiderlings of both sexes, and all regained white markings as mature males or females .” FROM: Taylor, B . B ., and Peck, W. B . 1975 . A comparison of northern and southern forms of Phidippus audax (Hentz) (Araneida, Salticidae) . J . Arachnol . 2 :89-99.
http://www.americanarachnology.org/JoA_free/JoA_v2_n2/JoA_v2_p89.pdf

After waiting for it to molt from its white patterned form into this penultimate orange form I let it go back into the same bushes where I found it.