CIVILIAN PERMANENT CHANGE OF STATION (PCS) CHECKLIST. A PCS move involves a great deal of advance planning and hard work. We would like to make this transition as. smooth as possible by providing this guide. Remember that this guide is just that-a guide, and does not supersede. any laws, regulations or directives that are already in place. 6 months out Report date -180 days.
Thus it is clear that cloaca is used for excretion as well as reproduction. This is also the opening that is used for laying eggs. Anus on the other hand is simply an opening at the distal end of the alimentary canal. It is a passage for undigested waste only.
It also occurs in birds that have a habit of holding in the stool for long periods of time, like overnight, instead of dropping it as it is comes to cloaca. Any combination of the above reasons can lead to straining, dilating and stretching of the vent, making the bird an ideal candidate for cloacal prolapse. 1  1.he cloaca is the part of the birdâs body which stores urates, feces, urine and egg. The cloacal lips (or vent) are used to control the passage and frequency of droppings and other eliminations.