diff --git a/docs/source/_static/custom.css b/docs/source/_static/custom.css
new file mode 100644
index 000000000..cf5d7c12c
--- /dev/null
+++ b/docs/source/_static/custom.css
@@ -0,0 +1,5 @@
+/* Fix version switcher overflow */
+.bd-sidebar .version-switcher__menu {
+    max-height: 300px;
+    overflow-y: auto;
+}
diff --git a/docs/source/_static/mi b/docs/source/_static/mi
new file mode 100644
index 000000000..cf1b971cd
--- /dev/null
+++ b/docs/source/_static/mi
@@ -0,0 +1,2 @@
+Anopheles_funestus.jpg
+Anopheles_minimus.jpg
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 4695b6872..ea067aa11 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -46,5 +46,8 @@
     ],
 }
 html_static_path = ["_static"]
+html_css_files = [
+    "custom.css",
+]
 html_logo = "_static/logo.svg"
 html_favicon = "_static/favicon.ico"
diff --git a/docs/source/index.rst b/docs/source/index.rst
index f9658a78e..6e4eb761f 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -25,7 +25,7 @@ API documentation
 
       *Anopheles funestus* subgroup.
 
-      .. image:: https://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Anopheles_Funetus.jpg/640px-Anopheles_Funetus.jpg
+     .. image::_static/mi/Anopheles_funestus.jpg
 
    .. grid-item-card:: ``Amin1``
       :link: Amin1
@@ -33,7 +33,7 @@ API documentation
 
       *Anopheles minimus*.
 
-      .. image:: https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Anopheles_minimus_1.jpg/640px-Anopheles_minimus_1.jpg
+     .. image:: _static/mi/Anopheles_minimus.jpg
 
    .. grid-item-card:: ``Adir1``
       :link: Adir1
diff --git a/docs/source_static b/docs/source_static
new file mode 100644
index 000000000..ef87106bf
--- /dev/null
+++ b/docs/source_static
@@ -0,0 +1,2 @@
+Anopheles funestus.webp
+Anopheles minimus.webp
diff --git a/malariagen_data/ag3.py b/malariagen_data/ag3.py
index 6c43654bf..1e7b37540 100644
--- a/malariagen_data/ag3.py
+++ b/malariagen_data/ag3.py
@@ -416,4 +416,8 @@ def cross_metadata(self):
     def _results_cache_add_analysis_params(self, params):
         super()._results_cache_add_analysis_params(params)
         # override parent class to add AIM analysis
-        params["aim_analysis"] = self._aim_analysis
+        params["aim_analysis"] = self._aim_analysis 
+        from .utils.summary import dataset_summary
+
+def summary(self):
+    return dataset_summary(self.data)
diff --git a/malariagen_data/utils/summary.py b/malariagen_data/utils/summary.py
new file mode 100644
index 000000000..b898553b1
--- /dev/null
+++ b/malariagen_data/utils/summary.py
@@ -0,0 +1,7 @@
+def dataset_summary(df):
+    return {
+        "rows": len(df),
+        "columns": len(df.columns),
+        "missing_values": df.isnull().sum().sum(),
+        "duplicate_rows": df.duplicated().sum()
+    }