Harvester (Skyline)

Overview
They are black-celophapod creatures with the ability to entrance different species.

Species
There are four known types:

Drones are squid-octopus like aliens with multiple eyes and glowing lights on their tentacles that they use to entrance other species. Drones have the ability to steal the brain and spinal cords of their prey. Drones have slimy black skin.

Tankers are giant crab-frog like creatures with multiple eyes and 8 brains for "power" instead of entrancing prey with blue lights the have clingy tentacles which they use to hunt, they walk/run on four legs and are olive green in color. They are incredibly stong but their skin is flamable.

Arerial drones are black flying aliens that function as dropships, which means they patrol and release drones to find prey. They have with wings, one big blue eye, but lack the power to entrance their prey. They are Kamikazies or "suicide bombers" when combating aircraft.

'''Worker/guard/soilder? a'''re graudripeds which resemble smaller tankers. They have watermelon-like heads with multiple blue eyes and slimy black skins like the drones. Every individual needs a stolen brain in order to function.

Abilities and anatomy
They have the ablity to entrance a host and feed/power up by "brains" .have a blakish-purple blood.They use a bright blue light to entrance creatures and suck them in there body by wholes or mouth-like things only the Drones have the power to entrance.This probably a evolutionary trait or somthing that they developed.They have Alot of Stem cells or somthing totally different because there tentacles can regenerate to there body.

Technology
There technology is a fusion of metellic metals with some organic properties and there machines can rebuild themselves even after a nuclear strike!(it might be destroyed if if gets hit in the inside.)

heres a list of machines:

Their ships are made with a metal hull and organic substances on the inside, a gravity lift ,and the power to entrance.And look saucer-like in general,but with spirals and arches sticking out.

Their lights are bright blue Teleporters that can suck Humans into thin air, possible desends from the ships?

Alien sorter is a thin machine with a blue light on the front with a 3-pronged claw,a razor blade, and a tube that sucks up the brains into an a room that attaches it to the aliens.

Although they do not have any type of small arms or ship firing guns (with the exception of the Arerial Drone as it is a "living missle") they are advanced technology wise.