One of the most dangerous chickens is the Bombardier.
It has massive evolved jaws filled with flammable fluids, and can throw very deadly flames in a large range around it.
They usually will start appearing when the Queen is angered around 50%. Be ready to defend against these when the time comes!
Spectre Apex Spiker
Spectre Apex Swarmer
These rare ''Lobbers'' are often not detected at first, but their magnetized EMP plasma acid is. The Lobber is the only Chicken that can produce the blue-ish glowing substance and spit it at a very high trajectory and long range.
They do both damage and can instant paralyse units when the acidic plasma hits.
When you see blue plasma in the sky, prepare and build shields as soon as possible!
When these are angered / wounded, they can turn into an enraged flame chicken. Don't let their small size fool you, they pack a punch and can do a lot of damage.