Wyvern bones

The RuneScape Wiki also has an article on: rsw:Wyvern bones

Wyvern bones
Released							12 December 2005 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							Yes
Equipable							No
Stackable							No
Noteable							Yes
Destroy							Drop
Examine							Bones of a large flying creature!
Values
Value							160 coins
High alch							96 coins
Low alch							64 coins
Weight							0.5 kg
Grand Exchange
Exchange							1,828 coins (info)
Buy limit							7,500
Daily volume							512,673
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Advanced data
Item ID							6812

Wyvern bones are dropped by Wyverns, which give 72 Prayer experience when buried. This can be increased by offering the bones in different ways:

• 252 XP when offered at a gilded altar with two burners lit or at the Chaos Temple.
• 288 XP when offered at the Ectofuntus in the form of wyvern bonemeal.

Item sources

For an exhaustive list of all known sources for this item, see here (include RDT).

Source	Level	Quantity	Rarity
Ancient Wyvern	210	1	Always
Long-tailed Wyvern	152	1	Always
Skeletal Wyvern	140	1	Always
Spitting Wyvern	139	1	Always
Taloned Wyvern	147	1	Always

Changes

Date	Changes
20 September 2018 (update)	The value was changed from 110 to 160 so that it would appear above less valuable items when on the ground.
18 January 2018 (update)	The value was changed from 0 to 110 so that it would appear above vials when on the ground.
18 September 2014 (update | poll)	The experience when burying, offering at a gilded altar and offering at the Ectofuntus was changed from 50, 175 and 200 to 72, 252 and 288, respectively, matching that of dragon bones.