diff --git a/batdetect2/data/datasets.py b/batdetect2/data/datasets.py
index f8d94be..f0e3278 100644
--- a/batdetect2/data/datasets.py
+++ b/batdetect2/data/datasets.py
@@ -26,9 +26,11 @@ from soundevent import data, io
 
 from batdetect2.configs import BaseConfig, load_config
 from batdetect2.data.annotations import (
+    AnnotatedDataset,
     AnnotationFormats,
     load_annotated_dataset,
 )
+from batdetect2.targets.terms import data_source
 
 __all__ = [
     "load_dataset",
@@ -113,10 +115,46 @@ def load_dataset(
     clip_annotations = []
     for source in dataset.sources:
         annotated_source = load_annotated_dataset(source, base_dir=base_dir)
-        clip_annotations.extend(annotated_source.clip_annotations)
+        clip_annotations.extend(
+            insert_source_tag(clip_annotation, source)
+            for clip_annotation in annotated_source.clip_annotations
+        )
     return clip_annotations
 
 
+def insert_source_tag(
+    clip_annotation: data.ClipAnnotation,
+    source: AnnotatedDataset,
+) -> data.ClipAnnotation:
+    """Insert the source tag into a ClipAnnotation.
+
+    This function adds a tag to the `ClipAnnotation` object, indicating the
+    source from which it was loaded. The source information is derived from
+    the `recording` attribute of the `ClipAnnotation`.
+
+    Parameters
+    ----------
+    clip_annotation : data.ClipAnnotation
+        The `ClipAnnotation` object to which the source tag will be added.
+
+    Returns
+    -------
+    data.ClipAnnotation
+        The modified `ClipAnnotation` object with the source tag added.
+    """
+    return clip_annotation.model_copy(
+        update=dict(
+            tags=[
+                *clip_annotation.tags,
+                data.Tag(
+                    term=data_source,
+                    value=source.name,
+                ),
+            ]
+        ),
+    )
+
+
 def load_dataset_from_config(
     path: data.PathLike,
     field: Optional[str] = None,