DeathStreamer said:
Pfft, Tyranids, are just a rip off of the zerg. It was my first thought when I saw them (mainly HUNDREDS of them). Zerg came first, zerg are cooler, zerg are evolved, some can fly

, but most of all, ZERG ARE INFINITE.
Tyranids appeared first in the "Rogue Trader" edition of Warhammer 40k, what was the first corebook and was released 1987. Starcraft and the Zerg were released 1999.
- Tyranids are the epitome of "evolved", they devour entire races and adapt their DNA to their genpool to create new mutations, literally on the fly to their next meal. The Carnifex, that inspired the Ultralisk, was created when the Tyranids got their claws on the dna of a Spacemarine Terminator.
- Gargoyles, a Tyranid unit, is very well able to fly, as are several other units that can adapt wings when needed. Lyctors for xample can "fly", or more hover decent heights using Psy-Powers.
- Tyranids are infinite by default. While the fleet is busy devourering a world, literally at the same time a whole new generation of a bigger number is hatching on the swarm-fleet.
You're welcome.