The Gemara story where a bird lays an egg and drowns a whole city

The size of an egg, you say? Well which egg: chicken? Snake? Robin? Do you know the Bar Yuchnei bird is so big that when one of its eggs fell from the sky, it flooded 60 villages and smashed through 300 cedar trees, utterly destroying them!? 

One second, don’t these birds lay their eggs on the ground? Yes, usually, but this one was unfertilized and wouldn’t hatch, so the bird through it away, and now we’ve got a flood

Some perspective on the concept of a Kabeitza