Bat demons are small, winged, aerial attackers reminiscent of the Blink type monsters from Diablo I. Unique amongst Diablo II monsters, bat demons hang from the ceiling (or thin air, on outdoor levels) and only drop down once a character is within their melee attack range. They can be targeted while on the ceiling, and can be hit by ranged attacks, or will drop down once a character is nearby. Bat demons are fond of flying away when they are low on hit points, and must be killed quickly, or pursued to their new perch.
* All values are listed by difficulty level: '''Normal / Nightmare / Hell.'''
=Statistics=
** The max TC/Rune possible may depend on which level a monster spawns in, and can be lower than the maximum. See the item [[calculators]] to ascertain precisely what a monster from a given area can drop.
{| width="100%" style="text-align:center"
! Type
! Level
! Experience
! Hit Points
! Speed
! Max TC/Rune
|-
| 152 / 3527 / 34432
| 22-78 / 557-876 / 2883-6041
| align="center" | 7
| 15/Nef, 48/Ko, 78/Cham
|-
| 223 / 5294 / 34432
| 31-102 / 702-1103 / 2883-6041
| align="center" | 8
| 18/Nef, 51/Lem, 78/Cham
|-
| 297 / 5664 / 36607
| 36-126 / 725-1140 / 3004-6294
| align="center" | 9
| 24/Ral, 54/Um, 78/Cham
|-
| 359 / 6748 / 40956
| 42-141 / 797-1252 / 3245-6800
| align="center" | 10
| 27/Ral, 57/Um, 87/Zod
|-
| 478 / 8035 / 39868
| 48-170 / 868-1365 / 3185-6673
| align="center" | 12
| 30/Ral, 60/Ist, 87/Zod
|-
! colspan="6" | Guest Monsters (Act Five, NM/Hell only)
|-
| '''Fiend'''
| -- / 65 / 85
| -- / 12808 / 40956
| -- / 1060-1666 / 4327-6800
| align="center" | 12
| -- / 63/Vex, 87/Zod
|-
| '''Gloombat'''
| -- / 61 / 83
| -- / 10144 / 38781
| -- / 965-1516 / 4166- 6547
| align="center" | 12
| -- / 60/Ist, 87/Zod
|}
=Offense=
All Bat Demons have a % chance to deal bonus lightning damage with their second attack type. * Speed rates a monster's movement speed from 1-10. (A few special monsters may move faster than 10.) {| width="100%" style="text-align:center"
! Type
! Speed
! Melee Attack #1
! Attack Rating #1
|-
| '''Desert Wing'''
| 7 / 7 / 7
| 7-10 / 24-25 / 59-63
| 135 / 882 / 3180
|-
| '''Fiend'''
| 8 / 8 / 8
| 8-12 / 26-28 / 59-63
| 174 / 990 / 3180
|-
| '''Gloombat'''
| 9 / 9 / 9
| 9-14 / 27-30 / 60-65
| 207 / 1008 / 3256
|-
| '''Blood Diver'''
| 10 / 10 / 10
| 10-15 / 29-31 / 62-67
| 223 / 1062 / 3408
|-
| '''Dark Familiar'''
| 12 / 12 / 12
| 11-17 / 30-32 / 61-65
| 256 / 1116 / 3370
| 85% chance of:<br /> 10-17 / 2-84 / 4-225
| 402 / 2232 / 6740
|-
! colspan="6" | Guest Monsters (Act Five, NM/Hell only)
|-
| '''Fiend'''
| -- / 34-37 / 62-67
| -- / 1260 / 3408
| -- / 42-60 / 76-110
| 85% chance of:<br /> -- / 2-95 / 4-230
| -- / 2520 / 6816
|-
| '''Gloombat'''
| -- / 33-35 / 61-65
| -- / 1188 / 3332
| -- / 40-58 / 75-108
| 85% chance of:<br /> -- / 2-91 / 4-225
| -- / 2376 / 6664
|}
=Defenses=
Blocking values are assigned to every monster in the game, but the ability is seldom enabled, so most monsters can not block (Hence the blocking % given on most Diablo II monster pages, including Blizzard's, is inaccurate.)
* Regen Rate tells what % of a monster's hit points are recovered per second. Standard is 1.2/sec.
* Blocking tells what % of successful, blockable attacks will not damage the monster. Monsters need not carry a shield to block.
* Drain Effectiveness tells what % of a character's mana and life steal apply to that monster. 100 is all, 0 is none.
* Chill Effectiveness tells what % of a character's cold length applies to the monster. 100 is all, 0 is no freeze/chill at all.
{| width="100%" style="text-align:center"
! Type
! Defense
! Blocking
! Regen Rate
! Drain Effectiveness
! Chill Effectiveness
| '''Desert Wing'''
| 75 / 686 / 1700
| 16align="center" | --| align="center" | 1.2%
| 100 / 85 / 75
| 50 / 40 / 33
| '''Fiend'''
| 95 / 765 / 1700
| 19align="center" | --| align="center" | 1.2%
| 100 / 85 / 75
| 50 / 40 / 33
| '''Gloombat'''
| 112 / 778 / 1739
| 22align="center" | --| align="center" | 1.2%
| 100 / 85 / 75
| 50 / 40 / 33
| '''Blood Diver'''
| 122 / 818 / 1816
| 24align="center" | --| align="center" | 1.2%
| 100 / 85 / 75
| 50 / 40 / 33
| '''Dark Familiar'''
| 136 / 858 / 1797
| 27align="center" | --| align="center" | 1.2%
| 100 / 85 / 75
| 50 / 40 / 33
|-
! colspan="6" | Guest Monsters (Act Five, NM/Hell only)
|-
| '''Fiend'''
| -- / 963 / 1816
| align="center" | --
| align="center" | 1.2%
| -- / 85 / 75
| -- / 40 / 33
|-
| '''Gloombat'''
| -- / 910 / 1777
| align="center" | --
| align="center" | 1.2%
| -- / 85 / 75
| -- / 40 / 33
|}
=Resistances=
Bat Demons are unusual in that they have almost no resistances. Each type has one immunity, but other than that, most any powerful attack will go right through them.
* Resistances over 99% are listed as immunities and monsters will take no damage from that type of attack.
* <font color="#FF0000ff0000">Immunities</font> can be "broken" by skills that lower resistance, if the value drops below 99%. See the [[Resistances#Immunities|Resistances]] page for more details.
{| width="100%" style="text-align:center"
! Type
! Physical
! Magic
! Fire
! Cold
! Lightning
! Poison
! Magic
|-
| '''Desert Wing'''
| 0% / 0% / 15%
| 0% / 0% / 25%
| 0% / 0% / <font color="#FF0000ff0000">100%</font>
| 0% / 0% / 0%
| 0% / 0% / 0%
| 0% / 0% / 0%
| 0% / 0% / 0%
| 0% / 0% / <font color="#FF0000ff0000">110%</font>
| 0% / 0% / 0%
|-
| 0% / 0% / 25%
| 0% / 0% / 0%
| 0% / 0% / <font color="#FF0000ff0000">10 0%</font>
| 0% / 0% / 0%
| 0% / 0% / 0%
| 0% / 0% / 15%
| 0% / 0% / 25%
| 0% / 0% / <font color="#FF0000ff0000">105%</font>
| 0% / 0% / 0%
| 0% / 0% / 0%
| 0% / 0% / 0%
| 0% / 0% / 0%
| 0% / 0% / <font color="#FF0000ff0000">120%</font>
| 0% / 0% / 0%
|-
! colspan="7" | Guest Monsters (Act Five, NM/Hell only)
|-
| '''Fiend'''
| -- / 0% / 10%
| -- / 0% / 33%
| -- / 0% / 33%
| -- / 50% / <font color="#FF0000">100%</font>
| -- / 0% / 0%
| -- / 0% / 0%
|-
| '''Gloombat'''
| -- / 0% / 10%
| -- / 0% / 33%
| -- / 0% / 33%
| -- / 50% / <font color="#FF0000">100%</font>
| -- / 0% / 0%
| -- / 0% / 0%
|}
=Locations=
* [[Guest Monsters]] are found only in Act Five, and only on Nightmare and Hell difficulty levels.
* Monsters in areas marked "Boss Only" will only appear as random bosses or champions.
* Monsters in areas marked "No Boss" will never appear as random bosses or champions.
{| width="100%"
! Type
! Acts 1-4: Normal, Nightmare, and Hell
|-
| '''Desert Wing'''
| '''Act 2: '''Halls of the Dead 1-3
|-
| '''Fiend'''
| '''Act 3: '''Arachnid Lair, Spider Cavern, Swampy Pit 1-3
|-
| '''Gloombat'''
| '''Act 2: '''Flayer Dungeon 1-3, Sewers 1
|-
| '''Blood Diver'''
| '''Act 3: '''Forgotten Temple, Ruined Fane, Forgotten Reliquary
|-
| '''Dark Familiar'''
| '''Act 4: '''City of the Damned
|-
! colspan="2" | Guest Monsters (Act Five, NM/Hell only)
|-
| '''Fiend'''
| Worldstone Keep 2
|-
| '''Gloombat'''
| Glacial Trail, Icy Cellar
|}
[[category:monsters]]
[[category:animals]]
[[category:Guest Monsters]]