No doubt because of climate change,
there seems to be a genetic mutation of rabbits in Canada
because this is what I saw happening this afternoon in a corner of the field where the snow has already melted
(full south, full wind ... the rest is still under the snow).
 
I asked the question at the Department of Canadian Wildlife,
they confirmed to me that it is undoubtedly a new mutant race of Pascalian lagomorphs;
they told me they will seriously study the thing before April 1, 2019!