diff --git a/ecoscope/io/earthranger.py b/ecoscope/io/earthranger.py
index 9f5ae510..c9442580 100644
--- a/ecoscope/io/earthranger.py
+++ b/ecoscope/io/earthranger.py
@@ -733,14 +733,14 @@ def get_patrol_observations(self, patrols_df, include_patrol_details=False, **kw
                                 ]
                             )
                         )
-                    observations.append(observation)
+                    if len(observation) > 0:
+                        observations.append(observation)
                 except Exception as e:
                     print(
                         f"Getting observations for subject_id={subject_id} start_time={patrol_start_time}"
                         f"end_time={patrol_end_time} failed for: {e}"
                     )
 
-        observations = [observation for observation in observations if len(observation) > 0]
         df = ecoscope.base.Relocations(pd.concat(observations))
         if include_patrol_details:
             return df.set_index("id")