diff --git a/glottolog3/templates/glottologmeta.mako b/glottolog3/templates/glottologmeta.mako
index 7e5411c..54b9508 100644
--- a/glottolog3/templates/glottologmeta.mako
+++ b/glottolog3/templates/glottologmeta.mako
@@ -510,7 +510,7 @@
 
         <%util:section title="Agglomerated Endangerment Status (AES)" prefix="">
             <p>
-                The Agglomerated Endangerment Status (AES) is derived from the databases of
+                The Agglomerated Endangerment Status (AES) is an endangerment scale, derived from the databases of
                 ${h.external_link("http://www.endangeredlanguages.com", label="The Catalogue of Endangered Languages (ELCat)")}
                 ,
                 ${h.external_link("http://www.unesco.org/languages-atlas/", label="UNESCO Atlas of the World's Languages in Danger")}
diff --git a/glottolog3/templates/langdocstatus/intro.mako b/glottolog3/templates/langdocstatus/intro.mako
index 0bf68e3..c901224 100644
--- a/glottolog3/templates/langdocstatus/intro.mako
+++ b/glottolog3/templates/langdocstatus/intro.mako
@@ -80,13 +80,15 @@
 
 <h4>Agglomerated Endangerment Status</h4>
 <p>
-    The Agglomerated Endangerment Status measures how endangered a language is according to an
-    agglomeration of the databases of
+    The Agglomerated Endangerment Status measures how endangered a language is. Originally, most of the
+    endangerment assessments were aggregated from
     ${h.external_link("http://www.endangeredlanguages.com", label="The Catalogue of Endangered Languages (ELCat)")}
     ,
     ${h.external_link("http://www.unesco.org/languages-atlas/", label="UNESCO Atlas of the World's Languages in Danger")}
     and
     ${h.external_link("http://www.ethnologue.com", label="Ethnologue")}.
+    Over time, assessments from other sources were included as well. For a full list of sources, see
+    ${h.external_link("https://github.com/glottolog/glottolog/blob/master/config/aes_sources.ini", label="AES sources in the Glottolog repository")].
 </p>
 <table class="table table-nonfluid">
     <thead>