Biplanes

General Info
Biplanes are the first type of planes to appear in Invasion, debuting in wave 2. It is also the plane used in Duel when the PX-35 Palmkiller mutator is not activated.

Characteristics
In Island Wars 2, their appearance is based on an actual biplane called the Wright Flyer. Their characteristics are similar to Air Balloons, in terms of colors and damage. The only differences between them and Anti-Palm Air Balloons are the missiles that don't shoot straight down, but rather at a small angle, depending on the palm trees themselves, and they don't move around the entire screen, they only move from left to right, slightly faster but they don't appear all of the time.

In Island Wars 2 Xmas, their appearance is changed to Santa's sleigh driven by its owner. Other than that, the sound effect of the sleigh being destroyed/hit is also different, and the missiles are replaced with presents from Chicken Invaders: The Next Wave. There aren't a lot of differences otherwise.