Threadworms (capillaria) are also referred to as hair worms or small roundworms. There are different types of threadworms and they affect different areas of the chicken. Some types invade the crop ...

They've existed for about 600 million years. There are about 34,000 different types of worm; many are so small you wouldn't be able to see them without a microscope! Worms are hermaphrodite ...