This morning i took my first photos of Frogs in 2014, but it was not what i was hoping for as my first shots ! This 2014 spring is cold like the winter we had and it looks like we will have 2 more weeks of cold days. This morning it was -1°C, again, and there was ice on the waterholes. What i found in a small waterhole (about 2×6 feet) beside the small pond (about 5×20 feet) both not very deep, is 5 dead frogs caught under the ice.
So it looks like these frogs choosed a too small waterhole for the long winter and just suffocated.
Here is an interesting article i found about the subject: