A God bird refers one of three different birds, the Zamorak hawk, Guthix raptor, or Saradomin owl. All three are birds of prey. The birds are pets that can be grown at level 70 Summoning from a Bird's egg. The colour of the egg indicates which bird will hatch from it: blue for Saradomin, green for Guthix, and red for Zamorak. God birds require two full stages of growth before they mature, the most among all pets. The three stages are 'chick', 'bird', and the mature bird (the final hawk, raptor, or owl form).
Except when using a Menagerie in a Player-owned house, a player can have only one hatched god bird at a time (at any stage of maturity). A player may have multiple bird's eggs without restriction. With a menagerie, players can have one of each bird.
When a god bird is grown to maturity, placing it in the menagerie allows the player to start incubating an egg for another type of god bird.
If a player puts a God bird in a menagerie, puts an egg into the incubator, and removes the bird from the menagerie and deposits it into a bank, when the egg in the incubator hatches, the player will lose the egg in the process of being hatched and will have to gain another egg in order to raise another bird.
Before an update removed the ability, players could have multiple god birds at the same time. A few players still have two or three god birds in their bank accounts, which they hatched before the update. However, if they take a bird out of the bank, they cannot return it to the bank if another god bird is in the bank. They can, however, raise it to maturity (if it is not yet mature), place it in the menagerie, and then take another bird out of the bank. If a player does not have a menagerie, the player's only options are to have the bird as a follower, to keep it in their inventory, or to dismiss it and lose it forever.
A bird's nest has about a 1 in 200 chance of containing a bird's egg through either the Kingdom Management activity, a random Bird's nest drop from Woodcutting, or a bird's nest reward from an Evil tree.
Note: Only the mature bird will provide protection. As a result, most people choose to raise the hawk or owl, so they don't need a Zamorak or Saradomin item. There are no Guthixian monsters in the God Wars Dungeon.