[quote=@BlackPanther]
[@Prince of Seraphs]
I like to think of it like so: 
Salamanders can be water or fire (I use salamanders because I understand them best and they are easiest to use for an example)
With that in mind neither fire nor water would survive in colder temperatures of winter fall or spring
They have to be kept hot and generally prefer warm temperatures

i feel like the others are similar
Some species are adapted for one environment or multiple and not others
[/quote]

For simple fae like the Salamanders that makes sense but it doesn't apply to all of them and if it did that would effectively end any sort of interactions the Courts could have with one another because the emissaries couldn't survive transition. Besides Mara are apparently Fall yet mine is leading the Spring Kingdom so evidently there is no environmental problem with majority of fae crossing borders.