Do chameleons yawn?

[ChameleonKing1911]

I was watching my veiled. He puffed up his chin, bulked up his body and open his mouth shaked a tiny bit and then closed his mouth and did it again. He slimmed down his body and "un-puffed" his chin then went to go get some water. This whole thing was in a span of about 15 seconds. Is this normal?

Note: I observed his mouth and tongue they looked normal as they were a pink and had no strings of saliva. He had no puss or anything in his mouth. (He still hasnt gone to the bathroom"

Is this normal? HELP


Chameleon Info:
Your Chameleon - Veiled Chameleon, Male, Juvenile (Just got him a few days ago)

Handling -I handle him 1-2 times a week

Feeding - I feed my Veiled Crickets and Mealworms. He will only eat 5 a day

Supplements - I dust using ReptiCal Calcium 4 times a week, ReptiCal D3 1 time a week, and Herptivite 2 times a month.

Watering - I mist him with warm water 4 times a day (Cage), I see him drinking every now and then, I use ReptiSafe to clean his water

Fecal Description - He hasnt defecated yet...

History - I got his from Petsmart where they treated him poorly (I saved him), He is very active, Sleeps on the top of his cage.

Cage Info:
Cage Type -Screen 24 x 24 x 36

Lighting - Lights go on at 9 AM And turn off at 9 PM, ReptiSun UVB 5.0 Mini,
75 Watt Basking Bulb

Temperature -I use a digital Therm, 73 at night, 88 at top of cage and ground at 76

Humidity - I mist 3-4 times a day, big dripper drips water all day that collects into a pan.

Plants - I use an Ivy, Money Tree, Parlor Palm, Umbrella Tree, and 17 Branches

Placement - Middle of the wall, NOT next to any vents.

Location - Near Indiana Illinios Wisconsin (That Region)

 

[Lpsouth1978]

Yes, this is a normal behavior. My male panther does this every morning. I don't know if he is actually yawning or just sort of stretching. It seems to me like the chameleon version of the morning stretch I do when I first wake up in the morning and before I get out of bed.

 

[JosieJobo]

They do it loads before and during shedding

 

[junglefries]

Most will do it first thing in the morning as soon as they decide to eat. My panthers pretty much do it every time before starting to eat. Jaw alignment. It tells me right away they are going to eat. If some don't do it, then there is no need for me to open door and feed. I know right away they aren't hungry.