From the Super Mario Wiki
Monocle Monicas are insectoids capable of flying and enemies that appear in Donkey Kong Country: Tropical Freeze. They only appear in Lost Mangroves levels, starting with Shipwreck Shore, where they appear in small alcoves with turf-covered walls.
Monocle Monicas resemble dragonflies, given their horizontal wings and overall physical constitution, which looks like a caricatured dragonfly's body due to their swelled thoraxes, short abdomens and tiny legs. They wear a monocle worn on their left eye, hence their name, and have a beak. Monocle Monicas have a grumpy and concentrated look.
As shown in their concept artwork, Monocle Monicas were originally depicted with small insect mandibles instead of beaks. Nevertheless, their mellow yellow color remained consistent.
Behavior and combat
The general behavior of Monocle Monicas involves flying in set paths unlike that of Hootz. Monocle Monicas use a dragonfly-type characteristic to fly, as they hover in a single position in midair while rapidly swinging their wings before quickly shifting into another position. Monocle Monicas may vary in their flying patterns: some fly between two positions, other between three in a row, while others follow rectangular trajectories. If the Kongs are on a vine and a Monocle Monica flies upwards and directly into them, the Monocle Monica gets defeated.