In Great Britain, red-billed chough (Pyrrhocorax pyrrhocorax) breed in discrete populations along the west coast: on Islay and Colonsay, in the Inner Hebrides of Scotland; on the Isle of Man; in Wales; and in Cornwall. Chough are dependent on pastures grazed by sheep or cattle, and their survival therefore depends on sympathetic management of grassland. The Scottish population is in decline, and all other populations are growing or stable. Sixty-three farmers in these regions whose farms were known to support feeding chough were asked questions about their farm management using a structured, questionnaire-based personal interview. Islay farms were significantly larger and had more grazing area, with the lowest stocking densities. Welsh farms had the least cropping area and the smallest number of cattle. Cornwall had the smallest number of sheep per farm. Welsh farms were more likely to not house cattle during winter. Liver fluke in sheep and ticks and tick-borne disease were a higher concern on Islay than other regions, and abortion in sheep was of highest concern on the Isle of Man. Islay farmers applied between 4× and 13× as many synthetic pyrethroid (SP) treatments to cattle per year than farmers at other regions, and the application rate of triclabendazole (TCBZ) to sheep was higher on Islay than other regions. The rate of application of other products, including macrocyclic lactones, did not differ among regions. The study described here shows clear differences in the farm grazing management, in the priority given to animal health problems and in the frequency of application of veterinary parasiticides among four regions that provide feeding habitat for chough in the United Kingdom. These differences suggest that the viability of chough populations might be favored by higher-intensity grazing and low rates of application of veterinary parasiticides of either the TCBZ or SP, or both classes of parasiticides.

在英国，红嘴山鸦（Pyrrhocorax pyrrhocorax）在西海岸的离散种群中繁殖：在苏格兰内赫布里底群岛的艾莱岛和科隆塞；在马恩岛；在威尔士; 在康沃尔郡 咳嗽依赖于绵羊或牛放牧的牧场，因此其生存取决于对草原的同情管理。苏格兰人口正在减少，所有其他人口正在增长或稳定。通过以问卷调查为基础的结构化个人访谈，向这些地区的63名农民（已知其农场支持饲喂红嘴）提出了有关农场管理的问题。艾莱岛农场规模更大，放牧面积更大，放养密度最低。威尔士农场的种植面积最少，牲畜数量最少。康沃尔郡每个农场的绵羊数量最少。威尔士的农场在冬季更有可能不饲养牛。与其他地区相比，艾莱岛（Islay）对绵羊的肝脏fl虫和壁虱及tick传疾病的关注程度更高，在马恩岛（Isle of Man），绵羊的流产问题最为关注。与其他地区的农民相比，艾莱岛的农民每年对牛使用的拟除虫菊酯（SP）处理数量是其他地区的4到13倍，三苯达唑（TCBZ）在绵羊上的施用率也高于其他地区。包括大环内酯在内的其他产品的施用率在各地区之间没有差异。此处描述的研究表明，在英国四个提供食饵栖息地的地区中，农场放牧管理，对动物健康问题的优先考虑以及兽用杀虫剂的施用频率存在明显差异。