Translation:Is this small lizard running across the river?
Does this small lizard run across the river? Is better english, I think.
You can use it like this when you are surprised to see or hear that such a small lizard is capable of running across the river.
Could "is running" also be used? I reported it, but I am still quite unsure of my rudimentary Hungarian skills...
Gyik means a lot more than lizard, salamander or newt should also be accepted