Scornet Maestro

The Scornet Maestro is a boss in Pikmin 3 found in the Twilight River, and is the fourth major boss encountered in Story Mode. It quickly abducts Louie before the player can reach him. It seems to be like a queen bee of sorts, since it's able to command a swarm of Scornets using its harp-like beak. The Scornet retinue is used to attack the Captains and their Pikmin. It relies heavily on the Scornets as the Scornet Maestro itself has no way attacking.

It cannot be attacked while its swarm is surrounding it, requiring the Captains to aim their Pikmin (preferably Winged Pikmin) at the boss after it exposes itself after one of its coordinated attacks. Once defeated, the Scornet Maestro will drop a Seed Hive and Louie, and all 100 of the Scornets it commanded will be able to be carried as well.

Pikmin Z
The Scornet Maestro only appears in the Painted Pines of the Fleeting Forest location, though significantly weaker than the original in Pikmin 3. Its behavior remains overall the same but if the Pikmin or player get too close to it, the Scornet Maestro is able to swipe at Pikmin with its arms, which can deal a bit of damage to the captain if hit. The way it commands the Scornets to attack are altered, and far less complicated:
 * Diet: Nectar
 * Predators: Puffy Blowhog, Flytrap Chrysanthemum (glitch)

1#Scornets line up in a wave, and fly straight forward at the player at medium speed.

2#Scornets hover nearby the player and dive from above.

The main food it's observed eating is the nectar its Scornets give to it. It doesn't actively hunt or react to other enemies in the game, but it will end up sending its Scornets to attack other enemies if it gets attacked first, and will try to drive them away. The most common enemy to see this happen is with the Puffy Blowhog: the main predator to a Scornet Maestro.
 * While the main predator to a Scornet Maestro is a Puffy Blowhog, a glitch will sometimes have a Flytrap Chrysanthemum eat a Scornet Maestro as well if it flies within range, although it normally eats regular Scornets.