diff --git a/notes/index.md b/notes/index.md
index b9bf257..02613fb 100644
--- a/notes/index.md
+++ b/notes/index.md
@@ -7,8 +7,13 @@
 ## General acoustics
 
 - [Linux audio recipes](/notes/linux-audio-recipes)
+
 - [Acoustics figures](/notes/acoustics-figures)
 
+## Bioacoustics
+
+- [Annotations](/notes/annotations)
+
 ## Coding
 
 ### General