Welcome to AFO 2020 Book Reviews! Beginning with this issue, we will publish themed sets of reviews. Topic suggestions are welcome! For this issue, I have chosen to review new and recently updated veterinary books or other published media pertaining to (mostly) wild birds. Although many of us would not choose to purchase the more expensive volumes for just occasional reference, being aware of their existence and breadth of coverage, and having a “point person” (author/editor) or publisher to contact for more information on a topic should prove useful. Researchers with access to interlibrary loan, article acquisition, or those at universities with veterinary colleges should have easy access to even the most otherwise inaccessible books.

Our focus on field ornithology as a “big picture” approach to the study of birds may sometimes neglect the obvious—what is the health status of the individuals we are studying? Are there basic anatomical‐physiological reasons why the birds are behaving as they are, or are constrained in their range of responses to environmental changes? Are we unaware of an underlying hormone or pathogen that may be influencing our observational results and skewing our interpretation of the data? The following medically oriented reference books on birds may provide insight into the body workings of the animals we are studying.

欢迎阅读AFO 2020书评！从本期开始，我们将发布主题性的评论集。欢迎主题建议！对于此问题，我选择查看与（大多数）野生鸟类有关的新的和最近更新的兽医书籍或其他已出版的媒体。尽管我们中的许多人都不会偶尔选择购买更昂贵的书籍，但要知道它们的存在和覆盖范围，并请“主要人物”（作者/编辑）或出版商联系以获取有关该主题的更多信息。应该证明是有用的。可以使用馆际互借，物品获取服务的研究人员，或者是拥有兽医学院的大学的研究人员，都应该可以轻松访问那些本来无法访问的书籍。

我们将田野鸟类学作为研究鸟类的“全局”方法的重点有时可能会忽略表面现象，即我们正在研究的个体的健康状况如何？是否有基本的解剖生理原因来说明鸟类表现得原样或受其对环境变化的响应范围所限制？我们是否没有意识到潜在的激素或病原体可能会影响我们的观察结果并歪曲我们对数据的解释？以下有关鸟类的医学参考书可以帮助您深入了解我们正在研究的动物的身体运作。