Report on the Migration of Birds in the Spring and Autumn of 1887. Ninth Report

The report provides data on various species noting specific arrival and departure times in spring and autumn as well as frequency patterns and changes from previous years. The authors analyze how factors such as wind temperature and storms affected migration comparing trends observed in 1887 to past reports to track possible shifts or continuities in behavior. This particular report also sheds light on the impact of certain extreme weather events on migration documenting how species adjusted to these conditions. As part of the early scientific inquiry into avian migration this ninth report represents an essential contribution to ornithological knowledge. By establishing a long-term dataset the authors helped lay the groundwork for future studies on migration patterns and environmental impacts. This document remains a valuable historical resource for understanding bird migration in the 19th century and the early methods of scientific documentation and collaboration in ornithology.