Click Here To Visit The SRGC Main Site
Interesting what you say about gut bacteria in hens Lesley; I hadn't heard that before. It's a protozoan parasite (Trichomonas gallinae) that greenfinches and other birds pick up in food contaminated with droppings and which eventually kills them (e.g. see here or here). Fortunately it's not the same species causing the STD in humans It's interesting too that greenfinches, like many birds, apparently use brighter plumage to signal to prospective mates their greater resistance to parasites & hence better reproductive fitness.