From ad6042602560ea6f24214e996b6b0a2e831b5f09 Mon Sep 17 00:00:00 2001
From: "John T. Wodder II" <git@varonathe.org>
Date: Mon, 4 Oct 2021 08:42:59 -0400
Subject: [PATCH] Fix a bug exposed by #780

---
 dandi/metadata.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dandi/metadata.py b/dandi/metadata.py
index e7ca29aa1..1afe7d23f 100644
--- a/dandi/metadata.py
+++ b/dandi/metadata.py
@@ -371,7 +371,9 @@ def extract_species(metadata):
                 f"Cannot interpret species field: {value}. Please "
                 "contact help@dandiarchive.org to add your species."
             )
-        return models.SpeciesType(identifier=value_id, name=value.capitalize())
+        return models.SpeciesType(
+            identifier=value_id, name=value.capitalize() if value is not None else None
+        )
     else:
         return ...