Select until 24 April

Totals Maasvlakte II 2016 - 2025

	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
1.	Dark-bellied Brent Goose	672	4394	448	1591	3072	2403	185	2606	229	9	15609	1561	0	4394 (2017)
2.	Black Brant	0	0	0	0	1	0	0	1	0	0	2	0.2	0	1 (2020)
3.	Canada Goose	4	0	0	7	3	5	2	0	1	0	22	2.2	0	7 (2019)
4.	Canada X Greylag Goose	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
5.	Barnacle Goose	4	0	39	0	2	65	1	0	0	0	111	11	0	65 (2021)
6.	Greylag Goose	13	62	103	19	15	42	9	2	25	2	292	29	7	103 (2018)
7.	goose sp.	10	82	80	0	2	25	0	0	0	0	199	20	0	82 (2017)
8.	Pink-footed Goose	0	2	90	0	0	0	0	0	0	0	92	9.2	0	90 (2018)
9.	Eurasian White-fronted Goose	22	0	1	0	40	0	0	0	0	0	63	6.3	0	40 (2020)
10.	Mute Swan	0	8	0	3	0	2	7	1	7	0	28	2.8	0	8 (2017)
11.	Whooper Swan	25	0	0	0	0	3	0	0	0	0	28	2.8	0	25 (2016)
12.	Egyptian Goose	3	9	26	29	37	15	24	3	5	5	156	16	2	37 (2020)
13.	Shelduck	80	198	38	51	36	28	26	175	11	0	643	64	0	198 (2017)
14.	Garganey	0	1	0	0	0	1	0	1	0	0	3	0.3	0	1 (2017)
15.	Shoveler	12	73	16	7	6	34	0	0	0	0	148	15	0	73 (2017)
16.	Gadwall	1	0	2	0	0	10	9	0	2	0	24	2.4	0	10 (2021)
17.	Wigeon	309	275	61	41	103	355	32	231	121	0	1528	153	4	355 (2021)
18.	Mallard	6	8	1	0	2	0	3	0	0	0	20	2	1	8 (2017)
19.	Pintail	19	120	3	0	20	57	8	194	52	0	473	47	0	194 (2023)
20.	Teal	55	272	66	21	26	196	4	72	51	0	763	76	13	272 (2017)
21.	duck sp.	0	28	27	20	17	29	10	2	8	0	141	14	0	29 (2021)
22.	Pochard	0	0	0	0	0	0	0	0	3	0	3	0.3	0	3 (2024)
23.	Tufted Duck	4	9	1	2	0	3	14	3	1	0	37	3.7	0	14 (2022)
24.	Scaup	0	1	0	0	6	0	0	0	0	0	7	0.7	0	6 (2020)
25.	Eider	278	160	131	103	84	116	59	74	81	0	1086	109	18	278 (2016)
26.	Velvet Scoter	49	12	19	26	7	25	7	22	15	0	182	18	1	49 (2016)
27.	Common Scoter	3647	3282	2482	1410	2853	4202	729	3431	1692	10	23738	2374	26	4202 (2021)
28.	Long-tailed Duck	0	3	0	0	1	1	0	0	0	0	5	0.5	0	3 (2017)
29.	Goldeneye	12	8	0	1	2	2	3	3	2	0	33	3.3	0	12 (2016)
30.	Goosander	0	1	0	4	1	0	0	5	2	0	13	1.3	0	5 (2023)
31.	Red-breasted Merganser	290	269	134	146	150	204	91	201	155	0	1640	164	0	290 (2016)
32.	Swift	2	3	0	0	1	0	0	3	0	0	9	0.9	0	3 (2017)
33.	Woodpigeon	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
34.	Red-necked Grebe	0	0	1	0	0	0	0	1	0	0	2	0.2	0	1 (2018)
35.	Great Crested Grebe	260	105	110	72	33	77	54	113	56	0	880	88	39	260 (2016)
36.	Slavonian Grebe	2	0	0	0	0	0	0	0	0	0	2	0.2	0	2 (2016)
37.	Black-necked Grebe	0	0	0	1	0	0	0	1	0	0	2	0.2	0	1 (2019)
38.	Oystercatcher	49	87	109	36	43	64	58	94	20	0	560	56	12	109 (2018)
39.	Avocet	5	1	11	0	0	0	0	0	1	0	18	1.8	0	11 (2018)
40.	Grey Plover	28	30	7	14	77	106	9	154	0	0	425	43	0	154 (2023)
41.	Golden Plover	0	1	5	13	0	5	4	25	0	0	53	5.3	0	25 (2023)
42.	Dotterel	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
43.	Ringed Plover	32	49	28	5	1	49	33	9	6	0	212	21	1	49 (2017)
44.	Lapwing	0	0	9	0	0	0	0	0	2	0	11	1.1	0	9 (2018)
45.	Whimbrel	13	16	61	12	5	58	4	55	14	11	249	25	1	61 (2018)
46.	Curlew	40	43	17	23	13	16	7	45	4	0	208	21	0	45 (2023)
47.	Bar-tailed Godwit	917	914	37	2	233	114	2	17	257	0	2493	249	1	917 (2016)
48.	Black-tailed Godwit	0	2	0	0	0	1	0	0	0	0	3	0.3	3	2 (2017)
49.	Jack Snipe	0	0	0	0	0	0	0	0	2	0	2	0.2	0	2 (2024)
50.	Woodcock	2	0	0	0	0	0	0	0	2	0	4	0.4	0	2 (2016)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
51.	Snipe	1	1	0	0	0	0	1	2	0	0	5	0.5	0	2 (2023)
52.	Grey Phalarope	0	5	1	1	0	0	0	5	2	0	14	1.4	0	5 (2017)
53.	Green Sandpiper	0	0	0	0	0	0	0	2	0	0	2	0.2	0	2 (2023)
54.	Redshank	3	17	0	16	5	2	0	1	1	0	45	4.5	0	17 (2017)
55.	Greenshank	0	3	0	2	0	0	0	0	0	0	5	0.5	0	3 (2017)
56.	Turnstone	5	16	11	9	12	13	14	20	17	0	117	12	0	20 (2023)
57.	Knot	118	105	4	22	12	206	0	14	2	0	483	48	0	206 (2021)
58.	Ruff	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
59.	wader sp.	17	79	15	13	142	101	16	188	8	0	579	58	0	188 (2023)
60.	small wader	0	0	0	0	0	0	0	2	0	0	2	0.2	0	2 (2023)
61.	Curlew Sandpiper	0	0	0	0	0	2	0	1	0	0	3	0.3	0	2 (2021)
62.	Sanderling	101	319	38	90	285	133	98	181	102	0	1347	135	11	319 (2017)
63.	Dunlin	171	439	51	220	349	332	133	3701	57	0	5453	545	0	3701 (2023)
64.	Purple Sandpiper	3	2	0	0	8	5	0	3	0	0	21	2.1	0	8 (2020)
65.	Little Stint	0	4	0	0	0	1	0	3	0	0	8	0.8	0	4 (2017)
66.	Calidris sp.	0	0	11	0	0	0	0	0	0	0	11	1.1	0	11 (2018)
67.	Little Tern	181	21	112	26	4	71	48	6	9	0	478	48	0	181 (2016)
68.	Gull-billed Tern	0	1	0	0	0	0	0	1	0	0	2	0.2	0	1 (2017)
69.	Black Tern	13	84	54	21	8	1553	5	18	0	0	1756	176	0	1553 (2021)
70.	Arctic Tern	0	36	8	16	4	42	0	9	23	2	140	14	0	42 (2021)
71.	Common/Arctic Tern	422	107	2	1000	156	152	0	1201	1662	263	4965	497	0	1662 (2024)
72.	Common Tern	572	1253	606	439	630	20065	2860	1441	28	0	27894	2789	54	20065 (2021)
73.	sterna sp.	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
74.	Sandwich Tern	544	2720	2152	2402	1720	11140	620	10917	604	365	33184	3318	27	11140 (2021)
75.	Little Gull	174	804	85	1837	1506	1094	32	1966	264	21	7783	778	500	1966 (2023)
76.	Kittiwake	1088	647	176	517	1189	1684	336	9665	910	0	16212	1621	43	9665 (2023)
77.	Sabine's Gull	0	7	0	2	1	5	2	3	3	0	23	2.3	0	7 (2017)
78.	Black-headed Gull	757	2591	127	686	965	1491	3353	545	361	0	10876	1088	154	3353 (2022)
79.	Mediterranean Gull	0	2	3	1	2	10	6	8	2	0	34	3.4	0	10 (2021)
80.	Common Gull	505	1082	31	0	478	1341	976	6359	1602	3	12377	1238	10	6359 (2023)
81.	Caspian Gull	1	2	0	0	0	0	0	10	8	0	21	2.1	0	10 (2023)
82.	Herring Gull	129	0	0	0	107	218	146	290	205	0	1095	110	54	290 (2023)
83.	Yellow-legged Gull	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2020)
84.	Great Black-backed Gull	84	73	15	0	129	284	162	150	185	0	1082	108	10	284 (2021)
85.	Glaucous Gull	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
86.	Lesser Black-backed Gull	30	0	51	1	375	2540	7914	25130	5288	52	41381	4138	48	25130 (2023)
87.	Laridae sp.	0	0	0	0	0	2	0	0	2	0	4	0.4	0	2 (2021)
88.	Iceland Gull	0	0	1	0	0	0	0	1	0	0	2	0.2	0	1 (2018)
89.	Long-tailed Skua	1	13	1	2	0	13	3	6	2	0	41	4.1	0	13 (2017)
90.	skua sp.	17	72	17	2	7	8	2	10	8	0	143	14	0	72 (2017)
91.	Arctic Skua	55	357	52	53	55	556	49	225	74	0	1476	148	6	556 (2021)
92.	Pomarine Skua	9	46	16	15	6	18	0	15	4	0	129	13	0	46 (2017)
93.	Great Skua	16	461	37	9	10	21	0	16	4	0	574	57	1	461 (2017)
94.	Razorbill	68	29	10	16	75	34	9	609	3	0	853	85	38	609 (2023)
95.	Razorbill/Guillemot	2645	1025	775	663	1395	3729	1595	6049	158	0	18034	1803	38	6049 (2023)
96.	Little Auk	11	0	0	1	3	2	0	0	7	0	24	2.4	0	11 (2016)
97.	Guillemot	172	212	4	29	6	62	13	16	3	0	517	52	16	212 (2017)
98.	Red-throated Diver	1957	682	549	847	1393	2065	946	1398	1100	0	10937	1094	40	2065 (2021)
99.	Black-throated Diver	3	14	3	5	7	27	7	26	4	0	96	9.6	0	27 (2021)
100.	Great Northern Diver	1	1	0	1	1	0	0	4	4	0	12	1.2	0	4 (2023)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
101.	diver sp.	273	663	233	292	47	86	14	3	1	0	1612	161	2	663 (2017)
102.	Wilson's Storm-Petrel	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
103.	Storm Petrel	0	0	0	0	0	0	0	2	0	0	2	0.2	0	2 (2023)
104.	Leach's Petrel	0	58	14	1	5	20	2	4	1	0	105	11	0	58 (2017)
105.	Fulmar	2	29	1	0	1	21	2	1	1	0	58	5.8	0	29 (2017)
106.	Sooty Shearwater	52	21	7	3	29	56	28	13	114	0	323	32	0	114 (2024)
107.	Manx Shearwater	4	57	11	10	9	1	1	4	2	0	99	9.9	0	57 (2017)
108.	Balearic Shearwater	0	1	0	0	2	0	0	0	1	0	4	0.4	0	2 (2020)
109.	shearwater sp.	0	0	0	0	0	2	2	1	1	0	6	0.6	0	2 (2021)
110.	Gannet	3440	1973	762	811	1490	2391	1869	5267	1572	0	19575	1958	68	5267 (2023)
111.	Cormorant	506	1356	1094	478	452	2635	1311	545	300	2	8679	868	155	2635 (2021)
112.	Shag	1	0	1	0	0	0	0	0	0	0	2	0.2	0	1 (2016)
113.	Great White Egret	0	7	9	0	0	4	0	0	0	0	20	2	0	9 (2018)
114.	Grey Heron	3	4	9	2	1	12	1	17	0	0	49	4.9	0	17 (2023)
115.	Sparrowhawk	0	2	0	1	1	2	0	0	0	0	6	0.6	0	2 (2017)
116.	Marsh Harrier	0	2	2	0	0	1	0	1	0	0	6	0.6	0	2 (2017)
117.	Hen Harrier	0	0	1	0	7	0	1	0	0	0	9	0.9	0	7 (2020)
118.	Pallid Harrier	0	1	0	0	0	0	1	0	0	0	2	0.2	0	1 (2017)
119.	Common Buzzard	0	0	0	0	0	2	0	0	0	0	2	0.2	0	2 (2021)
120.	Short-eared Owl	2	1	1	1	1	3	0	0	0	0	9	0.9	0	3 (2021)
121.	Kestrel	2	3	1	1	0	2	0	3	0	0	12	1.2	4	3 (2017)
122.	Merlin	1	2	0	0	1	2	0	0	0	0	6	0.6	0	2 (2017)
123.	Hobby	0	1	1	0	0	0	0	0	0	0	2	0.2	0	1 (2017)
124.	Peregrine	1	3	2	1	0	1	0	0	0	0	8	0.8	0	3 (2017)
125.	Magpie	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2020)
126.	Jackdaw	10	5	21	3	40	0	0	5	21	0	105	11	0	40 (2020)
127.	Carrion Crow	4	22	19	27	6	3	3	5	3	0	92	9.2	6	27 (2019)
128.	Hooded Crow	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
129.	Wood Lark	5	0	0	0	0	0	0	0	0	0	5	0.5	0	5 (2016)
130.	Skylark	503	214	39	10	37	10	7	18	0	0	838	84	0	503 (2016)
131.	Sand Martin	0	0	1	0	1	6	0	0	0	0	8	0.8	0	6 (2021)
132.	Swallow	59	84	51	34	10	73	25	5	0	1	342	34	0	84 (2017)
133.	Whitethroat	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2021)
134.	Starling	1378	3515	355	12835	6001	2330	154	8565	209	0	35342	3534	0	12835 (2019)
135.	Song Thrush	0	0	2	0	6	0	0	0	0	0	8	0.8	3	6 (2020)
136.	Redwing	0	0	0	0	87	0	0	0	0	0	87	8.7	0	87 (2020)
137.	Blackbird	2	0	0	0	0	0	0	0	1	0	3	0.3	0	2 (2016)
138.	Fieldfare	0	0	7	0	0	0	1	3	1	0	12	1.2	0	7 (2018)
139.	Robin	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2019)
140.	Whinchat	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2021)
141.	Blue-headed Wagtail	17	0	6	2	0	3	6	0	0	1	35	3.5	1	17 (2016)
142.	Yellow wagtail sp.	0	9	0	0	0	1	0	0	0	0	10	1	0	9 (2017)
143.	Grey Wagtail	1	5	5	11	1	1	0	1	0	0	25	2.5	0	11 (2019)
144.	White Wagtail	9	11	4	4	4	21	8	2	3	0	66	6.6	10	21 (2021)
145.	alba wagtail sp.	0	0	6	0	0	1	1	0	0	0	8	0.8	0	6 (2018)
146.	Meadow Pipit	225	160	101	213	69	81	37	24	6	0	916	92	11	225 (2016)
147.	Tree Pipit	2	0	0	0	0	0	0	0	0	0	2	0.2	0	2 (2016)
148.	Rock Pipit	0	0	0	1	1	3	0	0	0	0	5	0.5	0	3 (2021)
149.	pipit sp.	0	2	0	0	0	0	0	0	0	0	2	0.2	0	2 (2017)
150.	Chaffinch	17	108	32	130	122	48	2	2	2	0	463	46	0	130 (2019)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
151.	Brambling	0	0	2	31	0	1	0	0	0	0	34	3.4	0	31 (2019)
152.	Linnet	21	43	7	2	3	29	12	40	9	0	166	17	2	43 (2017)
153.	Lesser Redpoll	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2020)
154.	redpoll sp.	0	0	2	0	0	0	0	1	0	0	3	0.3	0	2 (2018)
155.	Siskin	0	0	2	2217	14	30	35	15	0	0	2313	231	0	2217 (2019)
156.	Lapland Bunting	2	1	0	0	4	3	0	1	0	0	11	1.1	0	4 (2020)
157.	Snow Bunting	1	123	2	0	8	0	0	1	0	0	135	14	1	123 (2017)
158.	Reed Bunting	0	0	0	0	2	0	0	0	0	0	2	0.2	0	2 (2020)
159.	passerine sp.	0	0	0	0	4	0	0	0	0	0	4	0.4	0	4 (2020)
	Other species
1.	Harbour Porpoise	14	15	5	3	6	9	3	5	1	0	61	6.1	2	15 (2017)
2.	Grey seal	0	0	0	0	0	0	3	1	1	0	5	0.5	0	3 (2022)
3.	Common Seal	2	2	0	0	1	0	1	0	0	0	6	0.6	0	2 (2016)
4.	Common / Grey seal	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
	Other species
1.	European Peacock	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
2.	white sp. (butterfly)	2	0	0	0	0	0	0	0	0	0	2	0.2	0	2 (2016)
	Other species
1.	Bumblebee sp.	7	0	0	0	0	0	1	0	0	0	8	0.8	0	7 (2016)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
	Totals	23309	32366	12001	29748	26413	65231	24274	92316	17793	747	324198	32420	1444
	Observation hours	127:06	175:14	105:11	98:35	130:05	225:22	100:40	147:05	76:33	1:00	1,186:51	118:41

Trektellen

Totals Maasvlakte II 2016 - 2025