Select until 11 January

Totals Maasvlakte II 2017 - 2026

	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
1.	Dark-bellied Brent Goose	4394	448	1591	3072	2403	185	2606	229	196	12	15136	1514	0	4394 (2017)
2.	Black Brant	0	0	0	1	0	0	1	0	0	0	2	0.2	0	1 (2020)
3.	Canada Goose	0	0	7	3	5	2	0	1	0	0	18	1.8	0	7 (2019)
4.	Canada X Greylag Goose	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
5.	Barnacle Goose	0	39	0	2	65	1	0	0	55	0	162	16	0	65 (2021)
6.	Greylag Goose	62	103	19	15	42	9	2	25	5	0	282	28	7	103 (2018)
7.	goose sp.	82	80	0	2	25	0	0	0	0	0	189	19	0	82 (2017)
8.	Pink-footed Goose	2	90	0	0	0	0	0	0	10	0	102	10	0	90 (2018)
9.	Tundra Bean Goose	0	0	0	0	0	0	0	0	12	0	12	1.2	0	12 (2025)
10.	Eurasian White-fronted Goose	0	1	0	40	0	0	0	0	23	0	64	6.4	0	40 (2020)
11.	Mute Swan	8	0	3	0	2	7	1	7	1	0	29	2.9	0	8 (2017)
12.	Whooper Swan	0	0	0	0	3	0	0	0	0	0	3	0.3	0	3 (2021)
13.	Egyptian Goose	9	26	29	37	15	24	3	5	18	0	166	17	2	37 (2020)
14.	Shelduck	198	38	51	36	28	26	175	11	26	3	592	59	0	198 (2017)
15.	Garganey	1	0	0	0	1	0	1	0	0	0	3	0.3	0	1 (2017)
16.	Shoveler	73	16	7	6	34	0	0	0	5	0	141	14	0	73 (2017)
17.	Gadwall	0	2	0	0	10	9	0	2	9	0	32	3.2	0	10 (2021)
18.	Wigeon	275	61	41	103	355	32	231	121	25	22	1266	127	4	355 (2021)
19.	Mallard	8	1	0	2	0	3	0	0	0	6	20	2	1	8 (2017)
20.	Pintail	120	3	0	20	57	8	194	52	6	0	460	46	0	194 (2023)
21.	Teal	272	66	21	26	196	4	72	51	15	0	723	72	13	272 (2017)
22.	duck sp.	28	27	20	17	29	10	2	8	30	0	171	17	0	30 (2025)
23.	Pochard	0	0	0	0	0	0	0	3	0	0	3	0.3	0	3 (2024)
24.	Tufted Duck	9	1	2	0	3	14	3	1	2	0	35	3.5	0	14 (2022)
25.	Scaup	1	0	0	6	0	0	0	0	3	1	11	1.1	0	6 (2020)
26.	Eider	160	131	103	84	116	59	74	81	23	2	833	83	18	160 (2017)
27.	Velvet Scoter	12	19	26	7	25	7	22	15	7	0	140	14	0	26 (2019)
28.	Common Scoter	3282	2482	1410	2853	4202	729	3431	1692	601	33	20715	2072	21	4202 (2021)
29.	Long-tailed Duck	3	0	0	1	1	0	0	0	0	0	5	0.5	0	3 (2017)
30.	Goldeneye	8	0	1	2	2	3	3	2	2	0	23	2.3	0	8 (2017)
31.	Goosander	1	0	4	1	0	0	5	2	0	0	13	1.3	0	5 (2023)
32.	Red-breasted Merganser	269	134	146	150	204	91	201	155	53	1	1404	140	0	269 (2017)
33.	Swift	3	0	0	1	0	0	3	0	1	0	8	0.8	0	3 (2017)
34.	Woodpigeon	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2022)
35.	Red-necked Grebe	0	1	0	0	0	0	1	0	0	0	2	0.2	0	1 (2018)
36.	Great Crested Grebe	105	110	72	33	77	54	113	56	33	0	653	65	25	113 (2023)
37.	Black-necked Grebe	0	0	1	0	0	0	1	0	0	0	2	0.2	0	1 (2019)
38.	Black-necked / Slavonian Grebe	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2025)
39.	Oystercatcher	87	109	36	43	64	58	94	20	29	0	540	54	11	109 (2018)
40.	Avocet	1	11	0	0	0	0	0	1	0	0	13	1.3	0	11 (2018)
41.	Grey Plover	30	7	14	77	106	9	154	0	146	0	543	54	0	154 (2023)
42.	Golden Plover	1	5	13	0	5	4	25	0	0	0	53	5.3	0	25 (2023)
43.	Dotterel	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
44.	Ringed Plover	49	28	5	1	49	33	9	6	172	0	352	35	1	172 (2025)
45.	Lapwing	0	9	0	0	0	0	0	2	0	0	11	1.1	0	9 (2018)
46.	Whimbrel	16	61	12	5	58	4	55	14	94	0	319	32	0	94 (2025)
47.	Curlew	43	17	23	13	16	7	45	4	12	0	180	18	0	45 (2023)
48.	Bar-tailed Godwit	914	37	2	233	114	2	17	257	69	0	1645	165	1	914 (2017)
49.	Black-tailed Godwit	2	0	0	0	1	0	0	0	0	0	3	0.3	3	2 (2017)
50.	Jack Snipe	0	0	0	0	0	0	0	2	0	0	2	0.2	0	2 (2024)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
51.	Woodcock	0	0	0	0	0	0	0	2	1	0	3	0.3	0	2 (2024)
52.	Snipe	1	0	0	0	0	1	2	0	0	1	5	0.5	0	2 (2023)
53.	Grey Phalarope	5	1	1	0	0	0	5	2	2	0	16	1.6	0	5 (2017)
54.	Phalaropus sp.	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2025)
55.	Red-necked Phalarope	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2025)
56.	Green Sandpiper	0	0	0	0	0	0	2	0	0	0	2	0.2	0	2 (2023)
57.	Redshank	17	0	16	5	2	0	1	1	0	0	42	4.2	0	17 (2017)
58.	Greenshank	3	0	2	0	0	0	0	0	0	0	5	0.5	0	3 (2017)
59.	Turnstone	16	11	9	12	13	14	20	17	49	0	161	16	0	49 (2025)
60.	Knot	105	4	22	12	206	0	14	2	25	0	390	39	0	206 (2021)
61.	Ruff	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
62.	wader sp.	79	15	13	142	101	16	188	8	27	0	589	59	0	188 (2023)
63.	small wader	0	0	0	0	0	0	2	0	0	0	2	0.2	0	2 (2023)
64.	Curlew Sandpiper	0	0	0	0	2	0	1	0	8	0	11	1.1	0	8 (2025)
65.	Sanderling	319	38	90	285	133	98	181	102	231	0	1477	148	11	319 (2017)
66.	Dunlin	439	51	220	349	332	133	3701	57	163	0	5445	545	0	3701 (2023)
67.	Purple Sandpiper	2	0	0	8	5	0	3	0	5	0	23	2.3	0	8 (2020)
68.	Little Stint	4	0	0	0	1	0	3	0	4	0	12	1.2	0	4 (2017)
69.	Calidris sp.	0	11	0	0	0	0	0	0	0	0	11	1.1	0	11 (2018)
70.	Little Tern	21	112	26	4	71	48	6	9	10	0	307	31	0	112 (2018)
71.	Gull-billed Tern	1	0	0	0	0	0	1	0	0	0	2	0.2	0	1 (2017)
72.	Black Tern	84	54	21	8	1553	5	18	0	867	0	2610	261	0	1553 (2021)
73.	Arctic Tern	36	8	16	4	42	0	9	23	13	0	151	15	0	42 (2021)
74.	Common/Arctic Tern	107	2	1000	156	152	0	1201	1662	24122	0	28402	2840	0	24122 (2025)
75.	Common Tern	1253	606	439	630	20065	2860	1441	28	236	0	27558	2756	54	20065 (2021)
76.	sterna sp.	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2022)
77.	Sandwich Tern	2720	2152	2402	1720	11140	620	10917	604	5214	0	37489	3749	27	11140 (2021)
78.	Little Gull	804	85	1837	1506	1094	32	1966	264	183	2	7773	777	0	1966 (2023)
79.	Kittiwake	647	176	517	1189	1684	336	9665	910	514	202	15840	1584	43	9665 (2023)
80.	Sabine's Gull	7	0	2	1	5	2	3	3	0	0	23	2.3	0	7 (2017)
81.	Black-headed Gull	2591	127	686	965	1491	3353	545	361	870	18	11007	1101	154	3353 (2022)
82.	Mediterranean Gull	2	3	1	2	10	6	8	2	3	0	37	3.7	0	10 (2021)
83.	Common Gull	1082	31	0	478	1341	976	6359	1602	3634	180	15683	1568	5	6359 (2023)
84.	Caspian Gull	2	0	0	0	0	0	10	8	2	0	22	2.2	0	10 (2023)
85.	Herring Gull	0	0	0	107	218	146	290	205	349	21	1336	134	14	349 (2025)
86.	Yellow-legged Gull	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2020)
87.	Great Black-backed Gull	73	15	0	129	284	162	150	185	132	14	1144	114	5	284 (2021)
88.	Glaucous Gull	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2022)
89.	Lesser Black-backed Gull	0	51	1	375	2540	7914	25130	5288	5295	0	46594	4659	48	25130 (2023)
90.	Laridae sp.	0	0	0	0	2	0	0	2	0	0	4	0.4	0	2 (2021)
91.	large gull sp.	0	0	0	0	0	0	0	0	500	0	500	50	0	500 (2025)
92.	Iceland Gull	0	1	0	0	0	0	1	0	0	0	2	0.2	0	1 (2018)
93.	Long-tailed Skua	13	1	2	0	13	3	6	2	2	0	42	4.2	0	13 (2017)
94.	skua sp.	72	17	2	7	8	2	10	8	4	0	130	13	0	72 (2017)
95.	Arctic Skua	357	52	53	55	556	49	225	74	82	0	1503	150	6	556 (2021)
96.	Pomarine Skua	46	16	15	6	18	0	15	4	8	0	128	13	0	46 (2017)
97.	Great Skua	461	37	9	10	21	0	16	4	8	0	566	57	1	461 (2017)
98.	Razorbill	29	10	16	75	34	9	609	3	4	1	790	79	38	609 (2023)
99.	Razorbill/Guillemot	1025	775	663	1395	3729	1595	6049	158	75	8	15472	1547	32	6049 (2023)
100.	alca / fratercula spec	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2026)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
101.	Little Auk	0	0	1	3	2	0	0	7	1	0	14	1.4	0	7 (2024)
102.	Guillemot	212	4	29	6	62	13	16	3	11	0	356	36	15	212 (2017)
103.	Red-throated Diver	682	549	847	1393	2065	946	1398	1100	640	223	9843	984	29	2065 (2021)
104.	Black-throated Diver	14	3	5	7	27	7	26	4	0	0	93	9.3	0	27 (2021)
105.	Great Northern Diver	1	0	1	1	0	0	4	4	1	0	12	1.2	0	4 (2023)
106.	diver sp.	663	233	292	47	86	14	3	1	14	0	1353	135	2	663 (2017)
107.	Wilson's Storm-Petrel	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
108.	Storm Petrel	0	0	0	0	0	0	2	0	0	0	2	0.2	0	2 (2023)
109.	Leach's Petrel	58	14	1	5	20	2	4	1	0	0	105	11	0	58 (2017)
110.	Fulmar	29	1	0	1	21	2	1	1	1	1	58	5.8	0	29 (2017)
111.	Sooty Shearwater	21	7	3	29	56	28	13	114	64	0	335	34	0	114 (2024)
112.	Manx Shearwater	57	11	10	9	1	1	4	2	122	0	217	22	0	122 (2025)
113.	Balearic Shearwater	1	0	0	2	0	0	0	1	1	0	5	0.5	0	2 (2020)
114.	shearwater sp.	0	0	0	0	2	2	1	1	0	0	6	0.6	0	2 (2021)
115.	Gannet	1973	762	811	1490	2391	1869	5267	1572	2734	464	19333	1933	70	5267 (2023)
116.	Cormorant	1356	1094	478	452	2635	1311	545	300	1423	150	9744	974	183	2635 (2021)
117.	Shag	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
118.	Great White Egret	7	9	0	0	4	0	0	0	0	0	20	2	0	9 (2018)
119.	Grey Heron	4	9	2	1	12	1	17	0	4	0	50	5	0	17 (2023)
120.	Sparrowhawk	2	0	1	1	2	0	0	0	4	0	10	1	0	4 (2025)
121.	Goshawk	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2025)
122.	Marsh Harrier	2	2	0	0	1	0	1	0	0	0	6	0.6	0	2 (2017)
123.	Hen Harrier	0	1	0	7	0	1	0	0	1	0	10	1	0	7 (2020)
124.	Pallid Harrier	1	0	0	0	0	1	0	0	0	0	2	0.2	0	1 (2017)
125.	Common Buzzard	0	0	0	0	2	0	0	0	0	0	2	0.2	0	2 (2021)
126.	Short-eared Owl	1	1	1	1	3	0	0	0	0	0	7	0.7	0	3 (2021)
127.	Kestrel	3	1	1	0	2	0	3	0	0	0	10	1	1	3 (2017)
128.	Merlin	2	0	0	1	2	0	0	0	1	0	6	0.6	0	2 (2017)
129.	Hobby	1	1	0	0	0	0	0	0	0	0	2	0.2	0	1 (2017)
130.	Peregrine	3	2	1	0	1	0	0	0	2	0	9	0.9	0	3 (2017)
131.	Magpie	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2020)
132.	Jackdaw	5	21	3	40	0	0	5	21	4	0	99	9.9	0	40 (2020)
133.	Carrion Crow	22	19	27	6	3	3	5	3	0	0	88	8.8	6	27 (2019)
134.	Hooded Crow	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
135.	Blue Tit	0	0	0	0	0	0	0	0	4	0	4	0.4	0	4 (2025)
136.	Skylark	214	39	10	37	10	7	18	0	0	0	335	34	0	214 (2017)
137.	Sand Martin	0	1	0	1	6	0	0	0	0	0	8	0.8	0	6 (2021)
138.	Swallow	84	51	34	10	73	25	5	0	14	0	296	30	0	84 (2017)
139.	Whitethroat	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2021)
140.	Starling	3515	355	12835	6001	2330	154	8565	209	10688	0	44652	4465	0	12835 (2019)
141.	Song Thrush	0	2	0	6	0	0	0	0	0	0	8	0.8	3	6 (2020)
142.	Redwing	0	0	0	87	0	0	0	0	0	0	87	8.7	0	87 (2020)
143.	Blackbird	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2024)
144.	Fieldfare	0	7	0	0	0	1	3	1	0	0	12	1.2	0	7 (2018)
145.	Robin	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2019)
146.	Whinchat	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2021)
147.	Blue-headed Wagtail	0	6	2	0	3	6	0	0	1	0	18	1.8	1	6 (2018)
148.	Yellow wagtail sp.	9	0	0	0	1	0	0	0	0	0	10	1	0	9 (2017)
149.	Grey Wagtail	5	5	11	1	1	0	1	0	1	0	25	2.5	0	11 (2019)
150.	White Wagtail	11	4	4	4	21	8	2	3	4	0	61	6.1	10	21 (2021)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
151.	alba wagtail sp.	0	6	0	0	1	1	0	0	0	0	8	0.8	0	6 (2018)
152.	Meadow Pipit	160	101	213	69	81	37	24	6	42	0	733	73	11	213 (2019)
153.	Rock Pipit	0	0	1	1	3	0	0	0	0	0	5	0.5	0	3 (2021)
154.	pipit sp.	2	0	0	0	0	0	0	0	0	0	2	0.2	0	2 (2017)
155.	Chaffinch	108	32	130	122	48	2	2	2	854	0	1300	130	0	854 (2025)
156.	Brambling	0	2	31	0	1	0	0	0	0	0	34	3.4	0	31 (2019)
157.	Linnet	43	7	2	3	29	12	40	9	18	0	163	16	2	43 (2017)
158.	Lesser Redpoll	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2020)
159.	Redpoll	0	2	0	0	0	0	1	0	0	0	3	0.3	0	2 (2018)
160.	Siskin	0	2	2217	14	30	35	15	0	47	0	2360	236	0	2217 (2019)
161.	Lapland Bunting	1	0	0	4	3	0	1	0	0	0	9	0.9	0	4 (2020)
162.	Snow Bunting	123	2	0	8	0	0	1	0	0	0	134	13	1	123 (2017)
163.	Reed Bunting	0	0	0	2	0	0	0	0	0	0	2	0.2	0	2 (2020)
164.	passerine sp.	0	0	0	4	0	0	0	0	0	0	4	0.4	0	4 (2020)
	Other species
1.	Harbour Porpoise	15	5	3	6	9	3	5	1	1	0	48	4.8	2	15 (2017)
2.	Grey seal	0	0	0	0	0	3	1	1	1	0	6	0.6	0	3 (2022)
3.	Common Seal	2	0	0	1	0	1	0	0	2	0	6	0.6	0	2 (2017)
	Other species
1.	Bumblebee sp.	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2022)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
	Totals	32366	12001	29748	26413	65231	24274	92316	17793	61034	1366	362542	36254	881
	Observation hours	175:14	105:11	98:35	130:05	225:22	100:40	147:05	76:33	101:18	6:16	1,166:19	116:38

Trektellen

Totals Maasvlakte II 2017 - 2026