i'll wait for your attack then counter with a far superior attack of my own
you'll already have been killed and then violated by my beavers 
don't underestimate the power of my kangaroos the like horses and got powerful legs and a tail to match
but i think your leave another animal out of the equation

The Hitmen
oh shit I'm gonna have to summon the four species of bear found in Canada, who are incidentally the four largest species of bear in the world: black, grizzly, kodiak, and polar. Theys gon' rape yo' ass
then i must summon my Elite crew of Super Viscous Native Aussie Animals (S.V.N.A.A)
First of all the Dingo the most fierce K-9 known to man

one bite from this animal and your out for the count
Then the Emu tall and lanky but got claws bigger than a tiger and head butt to match.
Kookaburras will head the areal attacks
Penguin well work as front line men the little things will get your bears tied and confused by runing in random directions
Platypus to work as submarines shotting torpedoes (supplied by Ian Thorpe)
Tasmanian Devils will tackle the beaver obstacle with ease
Wombat call the shot and make the critical calls seeing that i don't want to get my hands dirty with Canadians
Cape Barron Gooses, Cockatoos and Tasmanian Pademelon will only reacts as backup (but won't be needed)
Koalas and Kangaroos will obviously make 75% of the kills
your defeat prone