A good visit to Abberton Reservoir and nearby Copt Hall today in cold, but mainly pleasant conditions. Sightings included 14 BLACK-NECKED GREBES (📷), SLAVONIAN GREBE, 3 SMEW (one male), female SCAUP, 7 WHITE-FRONTED GEESE, male HEN HARRIER, SHORT-EARED OWL and 10+ MEDITERRANEAN GULLS. #essexbirding