Silent Spring Toronto?

I've heard rumour that not a single amphibian has been sighted in the City of Toronto this spring.  Is it true? I was calling this the "year of the frog" on account on the wet conditions and unusual number of amphibian sightings.  What is going on in Toronto?   Increased UV exposure, Chytrid Fungus or estrogen analogues (e.g., flame retardents) influence on reproductive health?  http://en.wikipedia.org/wiki/Decline_in_amphibian_populations