bumblebees and coltsfoot flowers

Petasites sagittatus 

and

Tussilago farfara

tussilago - cough

farfara - coltsfoot

petasites - broad rimmed hat

sagittatus - like an arrow head

Both are coltsfoot, I spotted the yellow one, that doesn't grow here, in the botanical garden in Toronto on May 2 2014. 

And for the bees, they are both bumblebees, but the one with the orange bum, smaller and more slender, and the wings larger in proportion.

And the snail... i leave that up to you