diff --git a/lookyloo/lookyloo.py b/lookyloo/lookyloo.py
index a23e9ef..9cba90c 100644
--- a/lookyloo/lookyloo.py
+++ b/lookyloo/lookyloo.py
@@ -120,6 +120,8 @@ class Lookyloo():
                 self.monitoring = PyLookylooMonitoring(monitoring_config['url'], get_useragent_for_requests())
                 if self.monitoring.is_up:
                     self.monitoring_enabled = True
+                    # NOTE: maybe move that somewhere else: we'll need to restart the webserver
+                    # if we change the settings in the monitoring instance
                     self.monitoring_settings = self.monitoring.instance_settings()
 
         self.logger.info('Initializing context...')
diff --git a/website/web/__init__.py b/website/web/__init__.py
index a27ed32..92f4f27 100644
--- a/website/web/__init__.py
+++ b/website/web/__init__.py
@@ -709,6 +709,13 @@ def tree(tree_uuid: str, node_uuid: Optional[str]=None):
         if cache.error:
             flash(cache.error, 'warning')
 
+        if lookyloo.monitoring_enabled:
+            try:
+                monitoring_collections = lookyloo.monitoring.collections()
+            except Exception as e:
+                monitoring_collections = []
+                flash(f'Unable to get existing connections from the monitoring : {e}', 'warning')
+
         return render_template('tree.html', tree_json=ct.to_json(),
                                info=cache,
                                tree_uuid=tree_uuid, public_domain=lookyloo.public_domain,
@@ -717,6 +724,7 @@ def tree(tree_uuid: str, node_uuid: Optional[str]=None):
                                meta=meta, enable_mail_notification=enable_mail_notification,
                                enable_monitoring=lookyloo.monitoring_enabled,
                                monitoring_settings=lookyloo.monitoring_settings if lookyloo.monitoring_enabled else None,
+                               monitoring_collections=monitoring_collections if lookyloo.monitoring_enabled else [],
                                enable_context_by_users=enable_context_by_users,
                                enable_categorization=enable_categorization,
                                enable_bookmark=enable_bookmark,
diff --git a/website/web/templates/tree.html b/website/web/templates/tree.html
index 694260f..032ce54 100644
--- a/website/web/templates/tree.html
+++ b/website/web/templates/tree.html
@@ -740,8 +740,18 @@
               {% endif %}
             </div>
             <div class="mb-3">
-              <label for="collection" class="form-label">Collection</label>
+              {% if monitoring_collections %}
+              <label for="collection" class="form-label">Pick a collection.</label>
+              <input type="text" class="form-control" list="collections" id="collection" name="collection" placeholder="Type a collection name, or select an existing one (arrow down to see them)">
+              <datalist id="collections">
+                {% for name in monitoring_collections %}
+                <option value="{{name}}">{{name}}</option>
+                {% endfor %}
+              </datalist>
+              {%else%}
+              <label for=collection" class="form-label">Add to a collection.</label>
               <input type="text" class="form-control" name="collection" id="collection" placeholder="Name of the collection">
+              {% endif %}
             </div>
             <div class="mb-3 form-check">
                 <input class="form-check-input" type="checkbox" name="confirm" onchange="document.getElementById('btn-notification').disabled = !this.checked;"></input>