The wildlife is trying to enter all the time. This isn't sudden, like you said the population hasn't quadrupled in this time, the wildlife tens of miles outside

The wildlife is trying to enter all the time. This isn't sudden, like you said the population hasn't quadrupled in this time, the wildlife tens of miles outside the populated areas aren't suddenly aware of the reduced tourist population these last few weeks. This is just the natural response of the local ecosystem from having reduced numbers of competitors for resources.