What does green diarrhea in a raptor usually signify?

Green diarrhea in a raptor is often an indicator of underlying health issues, particularly related to the liver or other systemic problems. When a raptor exhibits green diarrhea, it can signify issues such as lead poisoning, liver dysfunction, or avian malaria. Lead poisoning can lead to a variety of neurological symptoms and gastrointestinal disturbances, including abnormal feces. Liver problems also disrupt the body's ability to process bile, potentially resulting in greenish-colored droppings. Avian malaria, caused by parasites, can affect the overall health and immune response, possibly leading to abnormal fecal coloration as well.

The other options, while they represent potential health concerns in raptors, do not specifically correlate with the symptom of green diarrhea. Frounce or low weight might indicate other conditions but does not typically present with green feces. Coccidiosis, a parasitic infection that can affect the gastrointestinal tract, is more commonly associated with diarrhea that may not specifically be green in color. Therefore, option B best captures the significance of green diarrhea as a symptom of serious underlying conditions.