Barely more than 3 million were printed, if I recall. Makes me wonder if all of the FDS prefix got issued (including the very narrow 3 million range), or if some of the higher 2 million onwards never got released the same way $5 ANU released fewer than 3 million despite having printed nearly 7 million?
The number of FDS prefix $10s printed was 3,140,000 according to the Charlton Catalogue.
The highest numbered FDS prefix note that I have in my possession is FDS2984691. I have not yet encountered an FDS prefix note higher than 3,000,000.
It is possible that the Bank of Canada ordered a halt to the distribution of multicolour $10s and the destruction of remaining stocks when the Birds $10 was put into circulation.
On a related topic, I recall seeing large volumes of consecutive 1979 multicolour $20 replacement notes being released in 1993 from CIBC "Instant Teller" machines. I remember one time when my mom withdrew some money and the machine dispensed 10 consecutive "5100" replacements.
I was a kid and I spent all of my money to buy a new Nintendo game, so I couldn't afford to ask her to keep one of those notes.

This event with the 1979 replacements happened months after the "new" birds of Canada notes were released and were dispensed by the bank machines. For several weeks afterward, this CIBC branch dispensed a mixture of "new" birds $20s and 1979 replacement notes from both printers,5100 and 5160.
Why would the Bank of Canada go out of its way in some cases to hold back and destroy large stocks of notes in some cases while allowing large volumes of replacement notes from a newly obsolete series which were not intended to be released consecutively en masse into circulation?
My thought is that in mid to late 1993, there was a sudden unexpected demand for $20 bills and the printing companies could not fulfill a rush order so the Bank of Canada met the demand by "scraping the bottom of the barrel" and released any unissued stock that they had in the vaults. The $20 was and still is the workhorse denomination in the economy so the Bank of Canada couldn't wait for the printers to catch up.
With $10 notes being relatively less popular in circulation, maybe the Bank of Canada could afford to destroy new old stock of multicolour notes and begin the withdrawal of the old series $10s while waiting for the new Birds series notes to arrive.
Thoughts?
Dean