Gleason's Gielinor Guide

Fever spider

Released		31 October 2005 (Update)
Members		Yes
Combat level		49
Size		2x2
Examine		A bunch of legs, eyes and teeth.
Combat info
XP bonus		+0%
Max hit		4 1–12 (without Slayer gloves)
Aggressive		No
Poisonous		Disease (8)
Attack style		Stab
Attack speed		4 ticks (2.4 seconds)
Respawn time		5 ticks (3 seconds)
Slayer info
Slayer level		42
Slayer XP		40 xp
Category		Fever Spiders
Assigned by
Combat stats

40	60	30	40	1	1
Aggressive stats

+0	+0	+0	+0	+0	+0
Melee defence

+20		+15		+10
Magic defence

+15			25% weakness
Ranged defence

+15		+15		+15
Immunities
Poison		0% resistance
Venom		0% resistance
Cannons		Not immune
Thralls		Not immune
Open in DPS calculator
Advanced data
Monster ID		626
Link		MOID

Fever spiders are Slayer monsters that require a Slayer level of 42 to kill, found only on Braindeath Island, in the brewery basement. This indirectly means players must also have started the Rum Deal quest in order to access them. Players must wear slayer gloves while fighting them, or face being damaged for 12.5% of their Hitpoints level and becoming diseased. Fever spiders are considered to be a relatively fast task due to the large quantity of spiders and their low Defence.

Players only need to wear slayer gloves if they are being hit by fever spiders, so players using Ranged or Magic may make use of safespots in order to wear better offensive gloves such as Barrows gloves. A notable safespot is located in the south-west corner, where players can trap the spiders on the edges of crates; however, due to the two tile wide nature of the spiders, many suitable safespots exist. Players safespotting the spiders without wearing slayer gloves are advised to bring a Relicym's balm in case the player accidentally becomes diseased.

Locations

Location	Levels	Members	Spawns	Map
Braindeath Island	49		11	Show map

Money making

The following money making guide is available for Fever spider:

Method	Hourly profit	Skills
Killing fever spiders	334,600	60+ , 60+ , 55 , 42

Drops

Drop rates are estimated based on 2,373,508 samples from the Drop Rate Project, unless otherwise cited.

The average Fever spider kill is worth 890.58.

100%

	Item	Quantity	Rarity	Price	High Alch
	Fever spider body	1	Always^{[d 1]}	Not sold	0

^ Fever spider bodies are only dropped during Rum Deal.

Weapons and armour

Item	Quantity	Rarity	Price	High Alch
Adamant axe	1	2/36	478	768
Red d'hide chaps	1	3/36	2,506	3,108
Adamant battleaxe	1	1/36	2,593	2,496
Adamant med helm	1	2/36	900	1,152

Herbs

	Item	Quantity	Rarity	Price	High Alch
	Grimy kwuarm	1	6/36	2,272	12

Other

Item	Quantity	Rarity	Price	High Alch
Bass	1–2	7/36	44–88	24–48
Coins	200–600	8/36	200–600	200–600
Pure essence	100–200 (noted)	2/36	200–400	200–400
Limpwurt root	1	4/36	226	4

Gem drop table

There is a 1/36 chance of rolling the gem drop table.

Item	Quantity	Rarity	Price	High Alch
Nothing	N/A	1/72.13; Never^{[d 1]}	N/A	N/A
Uncut sapphire	1	1/144; 1/73.12^{[d 2]}	206	15
Uncut emerald	1	1/288; 1/146.25^{[d 2]}	416	30
Uncut ruby	1	1/576; 1/292.5^{[d 2]}	1,011	60
Nature talisman	1	1/1,536; 1/780^{[d 2]}	159	2
Uncut diamond	1	1/2,304; 1/1,170^{[d 2]}	2,455	120
Rune javelin	5	1/4,608; 1/2,340^{[d 2]}	650	1,200
Loop half of key	1	1/4,608; 1/2,340^{[d 2]}	9,737	60
Tooth half of key	1	1/4,608; 1/2,340^{[d 2]}	9,917	60
Rune spear	1	1/73,728; 1/4,387.5^{[d 2]}^{[d 3]}	11,769	12,480
Shield left half	1	1/147,456; 1/8,775^{[d 2]}^{[d 3]}	65,429	66,000
Dragon spear	1	1/196,608; 1/11,700^{[d 2]}^{[d 3]}	37,749	37,440

^ The "nothing" drop is removed while wearing a ring of wealth.
^ ^2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.
^ ^3.0 ^3.1 ^3.2 Only dropped if Legends' Quest has been finished; if not, a talisman is dropped instead.

Changes

Date	Changes
25 June 2025 (Update)	Fever spiders now have a 25% elemental weakness to fire spells.
23 May 2024 (Update)	The NPC's drop table has been adjusted: The rune med helm has been replaced with the adamant med helm. The rune battleaxe has been replaced with the adamant battleaxe. The water battlestaff has been replaced with limpwurt roots.
8 May 2024 (Update)	The NPC's drop table has been expanded.
10 September 2015 (Update)	Duradel no longer assigns players Fever spider tasks.
5 December 2006 (Update)	The NPC was graphically updated. The NPC was renamed from "Fever Spider" to "Fever spider".

Gallery (historical)


31 October 2005 – 5 December 2006	5 December 2006 – present

Trivia

According to slayer masters when asked for a tip with killing fever spiders, the type of disease the spiders carry is called the Spider Fever.^[1]

References

^ Slayer Master. Old School RuneScape. "Fever Spiders are giant spiders that carry the deadly Spider Fever. If you don't want to catch it I suggest you wear Slayer Gloves to fight them."