As often as he wants to.
At least daily
24 hours.
once a day
Birds don't know what a car is, they just need to defecate. Also, they often defecate as they fly so their poop falls just anywhere.
When people die, they often expel their bodily fluids. It would not be uncommon for a deceased person to drool, urinate, or defecate.
The average is three times a day as puppy's need to be fed three times a day. But as they get older they should only have food two times a day.
The normal amount of times you would let your dog out any other day. If you are worried about your dog having to defecate more often, don't be. The worms are typically absorbed into the body after the dewormer kills them and are usually never seen in the stool. Most worms are microscopic anyways. Dewormers do not usually cause diarrhea.
Horses defecate while doing whatever they were doing when the 'urge' hit them. If they were standing still, then yes, they stand still. If they were walking, then they walk when they defecate. If horses are alarmed, they often defecate while running away.
Whenever they need to ! There is no set number of times a day !
They will often defecate (crap) on whatever is holding them and release a foul odor.
It depends how often they feed. Snakes defecate a few days after eating.