Couatling familiar

Innate Spellcasting. The couatl's spellcasting ability is Charisma (spell save DC 11). It can innately cast the following spells, requiring only verbal components:

1/day detect evil and good, detect magic, healing word

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

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 5 (1d4 + 3) piercing damage, and the target must succeed on a DC 11 Constitution saving throw or be poisoned for 1d4 hours, If successful, the target is immune to the poison for 24 hours.

Change Shape. The couatl magically polymorphs into owl (5ft, 60ft fly), cat (40 ft., climb 30 ft.), poisonous snake (30 ft., swim 30 ft). or back into its true form. It reverts to its true form if it dies. Its statistics are the same in each form, except for the speed changes noted. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.