diff --git a/app/templates/post/_post_teaser_masonry.html b/app/templates/post/_post_teaser_masonry.html
index 043eb568..f2536e51 100644
--- a/app/templates/post/_post_teaser_masonry.html
+++ b/app/templates/post/_post_teaser_masonry.html
@@ -34,10 +34,10 @@
                 <p><a href="{{ url_for('activitypub.post_ap', post_id=post.id) }}">{{ post.title|shorten(25) }}</a></p>
             </div>
         {% else %}
-            {% if post.url and (post.url.endswith('.jpg') or post.url.endswith('.webp') or post.url.endswith('.png') or post.url.endswith('.gif')) %}
+            {% if post.url and (post.url.endswith('.jpg') or post.url.endswith('.webp') or post.url.endswith('.png') or post.url.endswith('.gif') or post.url.endswith('.avif')) %}
                 <div class="masonry_thumb">
                     <a href="{{ post.url }}" rel="nofollow ugc" target="_blank" aria-label="{{ _('See image') }}"><img src="{{ post.url }}"
-                           alt="{{ post.title }}" loading="lazy" /></a>
+                           alt="{{ post.title }}" loading="{{ 'lazy' if low_bandwidth else 'eager' }}" /></a>
                 </div>
                 <div class="masonry_info">
                     <p><a href="{{ url_for('activitypub.post_ap', post_id=post.id) }}">{{ post.title|shorten(25) }}</a></p>