[quote=Yog Sothoth]
Yes but that still doesn't prohibit ninja from summoning animals that are not native to the environment. There are no rules with summoning techniques that you have to summon animals that are like the ones in ninja's homeland.
[/quote]

Does this mean I can summon a gigantic whale in the middle of a forest and expect it to survive?

It's a relatively minor detail that breaks the immersion for me, 's all.

Like making a Tsuchikage who uses nothing but Raiton or a Raikage with nothing but Doton. That kind of stuff.

Breaks the environmental tone.

[quote=Yog Sothoth]Just like how there is no universal law that says that a Konoha ninja cannot use any other element than fire.[/quote]

Maaaaaaaaaan screw Konoha, they get to pretty much do anything and it doesn't kill their flavor. They're essentially the melting pot of the Naruto world. 

Shit's annoying, yo'.