Swarm's natural armor bonus

[Tharkon]

Anyone know why wasps (FF, p172) have +1 natural armor while hellwasps (MM, p238) don't?

I'd think hellwasps were tougher.

 

[Shin Okada]

It just happens. Each creatures are made separately, maybe by different person.

Also, Fiend Folio is nearly 3.5e but not completely 3.5e. That book was released before the 3.5e core rules came.

 

[Tharkon]

Did apply the 3.5 update booklet to it and assumed that it should now have a size bonus, but should the size bonus replace the natural armor bonus?

Anyone know if rat swarms, hellwasp swarms, etc. had a natural armor bonus in 3.0?

I notice that about every 3.0 swarm has a natural armor bonus and for some reason no size bonus.

 

[Dross]

Did apply the 3.5 update booklet to it and assumed that it should now have a size bonus, but should the size bonus replace the natural armor bonus?

I wouldn't change things just because other swarms have something, (hopefully) they didn't miss it and it was intended to be this way.

I notice that about every 3.0 swarm has a natural armor bonus and for some reason no size bonus.

My theory on that is that there is no size bonus because swarms are made up of many tiny things (so you don't target an individual) rather than being one big solid mass. The NA represents that sometimes you push individuals out of the way rather than damage them via HP.