Why can't flying animals in nature pee? Why?

These flying animals are not unable to urinate, but their feces and urine are discharged together, so we will find that their feces are generally moist in our daily life, which is the main reason why they do not urinate directly. In addition, these flying animals generally have no bladder, which means that these birds can't store urine. So we can't see these birds urinating in our daily life. In fact, not only birds don't pee, but even chickens we see in our daily life don't pee. They are also excreted with feces and urine.

There are many things in the world, and our nature is also very ever-changing, and there are many magical things. For example, a bird can't fly. For example, the ostrich, the largest bird in the world, can't fly because it is too heavy. There are many amazing things, that is, in our observation, we often find that some mammals can't pee. Especially some flying birds, these birds, don't they drink water all their lives? Actually, they didn't. These birds also drink a lot of water. We often see some birds drinking water by some rivers, which proves that they can pee. Where else do they drink water?

Therefore, as long as we carefully observe these things around us in our life, we will find that bird droppings are generally moist, which shows that bird droppings and urine are excreted together through the urethra. Although these birds have no bladder, they still have plastic pipes. These ureters excrete all the garbage produced in the body through metabolism in the body, creating a healthy environment for birds.

Moreover, these birds do not have the advantage of bladder, that is, they can lose weight when flying in the air, because having bladder will store a lot of urine in the body, which is not conducive to flying.