I'm actually sorted in Hufflepuff too but I didn't take it

As serpent is the symbol of Slytherin then as hawk is the symbol of Hufflepuff
The green is the color of Slytherin and yellow is for Hufflepuff

The Hufflepuff dormitories and common room have never been seen by outsiders and is the only house with repelling devices in case of intruders. They are accessed through a pile of large barrels, found stacked in a shadowy stone recess on a right-hand side corridor near the kitchens. The barrel two from the bottom, middle of the second row, will open if tapped in the rhythm of 'Helga Hufflepuff'.

Hufflepuff Common room

As a security device to repel non-Hufflepuff students, tapping on the wrong barrel, or tapping the incorrect number of times, results in one of the other lids bursting off, drenching the impostor in vinegar.

However, once you make it through the tunnel entryway, the Hufflepuff dormitory is a quite cosy and welcoming place; it always feels sunny. The common room is a large, earthy, round room with low ceilings. The view from the round windows is of dandelions and rippling grass.

The decor emphasises the earthy-feel of the room with plants hanging and resting all about the room, some that even sing and dance. Burnished copper touchings with plush, cosy yellow and black patterned sofas and chairs welcoming a Hufflepuff student to relax and discuss the interesting specimens brought in by the Head of House, Professor Sprout. A Hufflepuff student retires through big, round doors in the walls of the common room to their dormitory.^[6][7]

Hufflepuff is really warm, the kids from Hufflepuff:

Justin Finch-Fletchley
Ernest McMillan
Hannah Abbott
Susan Bones
Cedric Diggory
Zacharias Smith
Leanne

The Slytherin common room is in the dungeons of Hogwarts Castle and underneath the Black Lake. Because of this, the light in the common room is green. Harry Potter along with Ron Weasley entered the common room in his second year to find out if Draco Malfoy was the one opening the Chamber of Secrets. To enter the Slytherin common room one must merely speak aloud the current password in front of a stretch of damp stone wall; once the word is uttered a concealed stone door will slide aside leaving a rectangular hole in the wall leading to the Slytherin common room. The only known Slytherin password is "pureblood", used in 1992.