Oops, I've just looked at the stats and noticed all (or at worst some) of the errors, mainly to do with the damage bonuses. I've fixed the sample beasties accordingly. I've also fiddled with the template to make the Flaming Bite fire damage scale with size, otherwise we'll have Diminutive cockroaches and Colossal purple worms both doing +1d6 fire damage after becoming burning zombies.
I've also statted up a Rat as a sample Tiny zombie. Rats may be the staple diet of Carnivorous Walls, so it's probable they amass enough of them to form a Burning Zombie Rat Swarm - just imagine all those scuttling bodies, with their heads on fire! Do Construct swarms get bonus HP? How should I apply the Flaming Bite? Since a Rat Swarm is treated as a 10' by 10' creature should I give it the bonuses for a Large burning zombie, like this:
Rat Swarm Burning Zombie
Type: Tiny Construct (Swarm)
Hit Dice: 4d10+33 (55 hp)
Initiative: +1
Speed: 10 ft. (2 squares), climb 10 ft, swim 10 ft.
Armor Class: 14 (+2 size, +1 Dex, +1 natural), touch 13, flat-footed 13
Base Attack/Grapple: +3/—
Attack: Swarm (1d6 plus 2d6 fire)
Full Attack: Swarm (1d6 plus 2d6 fire)
Space/Reach: 10 ft./0 ft.
Special Attacks: Distraction, flaming bite
Special Qualities: Damage reduction 5/slashing, darkvision 60 ft., construct traits, swarm traits
Saves: Fort +1, Ref +2, Will +1
Abilities: Str 4, Dex 13, Con—, Int—, Wis 10, Cha 1
Feats: Toughness
Skills: —
Environment: Any land or underground
Challenge Rating: 2
Alignment: Always neutral
Combat
A burning zombie rat swarm seeks to surround and attack any warm-blooded prey it encounters. A swarm deals 1d6 points of damage plus 2d6 points of fire damage to any creature whose space it occupies at the end of its move.
Distraction (Ex): Any living creature that begins its turn with a swarm in its square must succeed on a DC 12 Fortitude save or be nauseated for 1 round. The save DC is Constitution-based.
I'd like to do a Stirge as well - mainly because I like Stirges - but
unfortunately they lose their special attacks if I follow my template, which takes away all their charm. But if I cheat a bit and retain the Stirge's Extraordinary attacks, we get the following stats, I left the Burning Zombie Stirge's CR unchanged since it kept its nasty attack powers (EDIT - Oops, it should be CR 1/2 the same as the base creature, fixed it back):
Stirge Burning Zombie (modified)
Type: Tiny Construct
Hit Dice: 1d10+3 (8 hp)
Initiative: +3
Speed: 5 ft. (1 square), fly 30 ft. (clumsy)(6 squares)
Armor Class: 16 (+2 size, +3 Dex, +1 natural), touch 13, flat-footed 13
Base Attack/Grapple: +0/–11 (+1 when attached)
Attack: Attach +2 touch or bite -1 melee (1d3-3 and 1d4 fire)
Full Attack: Attach +2 touch or bite -1 melee (1d3-3 and 1d4 fire)
Space/Reach: 2-1/2 ft./0 ft.
Special Attacks: Attach, blood drain, Flaming bite
Special Qualities: Damage reduction 5/slashing, darkvision 60 ft., construct traits, low-light vision
Saves: Fort +0, Ref +3, Will +0
Abilities: Str 5, Dex 17, Con—, Int—, Wis 10, Cha 1
Feats: Toughness
Skills: —
Environment: Any land or underground
Challenge Rating: ½
Alignment: Always neutral
Combat
A burning zombie stirge attacks by landing on a victim, finding a vulnerable spot, and plunging its proboscis into the flesh. This is a touch attack and can target only Small or larger creatures.
Attach (Ex): If a burning zombie stirge hits with a touch attack, it uses its eight pincers to latch onto the opponent’s body. An attached burning zombie stirge is effectively grappling its prey. The stirge loses its Dexterity bonus to AC and has an AC of 13, but holds on with great tenacity. Stirges have a +12 racial bonus on grapple checks (already figured into the Base Attack/Grapple entry above).
An attached burning zombie stirge can be struck with a weapon or grappled itself. To remove an attached stirge through grappling, the opponent must achieve a pin against the stirge.
Blood Drain (Ex): A burning zombie stirge drains blood with its Flaming Bite proboscis, dealing 1d4 points of Constitution damage and 1d4 points of fire damage in any round when it begins its turn attached to a victim. Once it has dealt 4 points of Constitution damage, it detaches and flies off to deliver its meal to the Carnivorous Wall that created it. If its victim dies before the stirge’s appetite has been sated, the stirge detaches and seeks a new target.