
Here is the most common disguise the aliens use, along with another contraption of theirs for us to spoil our energy behind:

Beware that they are highly manipulative. With their cuddlyness and smiles they lure us into feeding them until we have nothing ourselves anymore. But be strong and resist that urge! Because if you give in and feed them, they shall grow to take over our world by infesting all our companies, politics, really all our institutions. By that time they look like this:

When they have reached that grown stage, it is far to late do anything against it anymore. Then all of us humans are already long imprisoned by them in crappy elderly homes.
So save our world, and resist while there is still time!
Kind regards, Vincent