Innate Spellcasting. Spellcasting ability is Charisma (spell save DC 7). It can innately cast the following spells, requiring only verbal components:

At will: detect evil and good, detect magic

2/day each: cure wounds, lesser restoration

1/day each: dream, scrying

Magic Weapons. weapon attacks are magical.

Shielded Mind. Is immune to scrying and to any effect that would sense its emotions, read its thoughts, or detect its location.

Snap: Melee Weapon Attack: +4 to hit; 5ft. Range; (1d6+2) piercing damage, and the target must succeed on a DC 11 Constitution saving throw or be poisoned until next short rest.

Bite: Melee Attack: +1 to hit, 5ft. Range; (1d4+1) piercing damage

Change Shape. magically polymorphs into another animal/creature that has a challenge rating equal to or less than its own, or back into its true form. It reverts to its true form if it dies. Any equipment it is wearing or carrying is absorbed or borne by the new form (the couatl's choice).

In a new form, retains its game statistics and ability to speak, but its AC, movement modes, Strength, Dexterity, and other actions are replaced by those of the new form, and it gains any statistics and capabilities (except class features, legendary actions, and lair actions) that the new form has but that it lacks. If the new form has a bite attack, the couatl can use its bite in that form.