Totals Maasvlakte II 2025

Year
Period
count-field
Also present

	Species	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
1.	Dark-bellied Brent Goose	9	0	0	0	0	4	150	30	193	173	20	131 (12 Oct)	25	7	23 Apr	21 Nov
2.	Barnacle Goose	0	0	0	0	0	0	54	1	55	54	1	40 ( 9 Oct)	11	3	9 Oct	17 Nov
3.	Greylag Goose	2	0	0	0	0	0	0	0	2	0	2	2 (23 Apr)	4	1	23 Apr	23 Apr
4.	Pink-footed Goose	0	0	0	0	0	0	10	0	10	10	0	10 (29 Oct)	4	1	29 Oct	29 Oct
5.	Tundra Bean Goose	0	0	0	0	0	0	0	10	10	10	0	10 ( 5 Nov)	4	1	5 Nov	5 Nov
6.	Egyptian Goose	5	0	0	0	0	0	0	11	16	7	9	6 ( 8 Nov)	11	3	23 Apr	12 Nov
7.	Shelduck	0	0	0	0	0	0	16	10	26	26	0	9 (17 Nov)	18	5	26 Oct	17 Nov
8.	Shoveler	0	0	0	0	0	1	4	0	5	5	0	4 (29 Oct)	7	2	11 Sep	29 Oct
9.	Gadwall	0	0	0	0	5	1	0	0	6	5	1	5 (30 Aug)	7	2	30 Aug	4 Sep
10.	Wigeon	0	0	0	0	0	2	1	19	22	22	0	8 ( 8 Nov)	21	6	11 Sep	21 Nov
11.	Pintail	0	0	0	0	0	5	0	1	6	6	0	4 ( 4 Sep)	11	3	4 Sep	12 Nov
12.	Teal	0	0	0	0	1	14	0	3	18	18	0	13 ( 5 Sep)	14	4	30 Aug	21 Nov
13.	duck sp.	0	0	0	0	0	11	0	19	30	23	7	10 (21 Nov)	18	5	5 Sep	21 Nov
14.	Tufted Duck	0	0	0	0	0	0	0	2	2	2	0	2 ( 5 Nov)	4	1	5 Nov	5 Nov
15.	Scaup	0	0	0	0	0	3	0	0	3	3	0	3 ( 5 Sep)	4	1	5 Sep	5 Sep
16.	Eider	0	0	0	0	0	4	2	5	11	8	3	4 (12 Sep)	18	5	12 Sep	21 Nov
17.	Velvet Scoter	0	0	0	0	0	3	0	2	5	3	2	3 ( 3 Sep)	7	2	3 Sep	17 Nov
18.	Common Scoter	10	0	0	0	18	231	165	109	533	415	118	150 ( 9 Oct)	71	20	23 Apr	21 Nov
19.	Goldeneye	0	0	0	0	0	0	0	2	2	2	0	2 ( 8 Nov)	4	1	8 Nov	8 Nov
20.	Red-breasted Merganser	0	0	0	0	0	1	2	9	12	11	1	7 ( 5 Nov)	18	5	5 Sep	21 Nov
21.	Swift	0	0	0	0	0	1	0	0	1	1	0	1 ( 3 Sep)	4	1	3 Sep	3 Sep
22.	Great Crested Grebe	0	0	0	1	0	9	4	7	21	15	6	6 (21 Nov)	32	9	7 Jul	21 Nov
23.	Black-necked / Slavonian Grebe	0	0	0	0	0	0	0	1	1	1	0	1 (17 Nov)	4	1	17 Nov	17 Nov
24.	Oystercatcher	0	0	0	1	8	11	3	5	28	28	0	10 ( 5 Sep)	29	8	7 Jul	8 Nov
25.	Grey Plover	0	0	0	0	6	131	6	3	146	146	0	52 ( 4 Sep)	25	7	5 Aug	5 Nov
26.	Ringed Plover	0	0	0	0	3	169	0	0	172	172	0	160 ( 3 Sep)	11	3	5 Aug	5 Sep
27.	Whimbrel	11	0	0	0	5	78	0	0	94	83	11	34 ( 3 Sep)	29	8	23 Apr	16 Sep
28.	Curlew	0	0	0	0	4	1	2	3	10	10	0	4 (30 Aug)	18	5	30 Aug	8 Nov
29.	Bar-tailed Godwit	0	0	0	0	0	69	0	0	69	69	0	68 (15 Sep)	7	2	15 Sep	16 Sep
30.	Woodcock	0	0	0	0	0	0	1	0	1	1	0	1 (29 Oct)	4	1	29 Oct	29 Oct
	Species	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
31.	Grey Phalarope	0	0	0	0	0	1	1	0	2	2	0	1 (16 Sep)	7	2	16 Sep	29 Oct
32.	Phalaropus sp.	0	0	0	0	0	1	0	0	1	1	0	1 ( 3 Sep)	4	1	3 Sep	3 Sep
33.	Red-necked Phalarope	0	0	0	0	0	1	0	0	1	1	0	1 (16 Sep)	4	1	16 Sep	16 Sep
34.	Turnstone	0	0	0	0	15	34	0	0	49	49	0	14 (30 Aug)	25	7	5 Aug	17 Sep
35.	Knot	0	0	0	0	1	24	0	0	25	25	0	15 ( 3 Sep)	14	4	5 Aug	16 Sep
36.	wader sp.	0	0	0	0	5	1	0	21	27	27	0	19 ( 5 Nov)	18	5	2 Aug	8 Nov
37.	Curlew Sandpiper	0	0	0	0	0	8	0	0	8	8	0	7 (15 Sep)	7	2	4 Sep	15 Sep
38.	Sanderling	0	0	0	0	6	210	12	3	231	231	0	130 ( 3 Sep)	32	9	5 Aug	5 Nov
39.	Dunlin	0	0	0	0	0	155	0	8	163	163	0	72 (17 Sep)	29	8	3 Sep	5 Nov
40.	Purple Sandpiper	0	0	0	0	0	1	3	1	5	5	0	2 (27 Oct)	14	4	17 Sep	5 Nov
41.	Little Stint	0	0	0	0	0	4	0	0	4	4	0	3 ( 4 Sep)	7	2	3 Sep	4 Sep
42.	Little Tern	0	0	0	0	0	10	0	0	10	10	0	10 ( 3 Sep)	4	1	3 Sep	3 Sep
43.	Black Tern	0	0	0	0	26	841	0	0	867	857	10	336 ( 3 Sep)	32	9	30 Aug	17 Sep
44.	Arctic Tern	2	0	0	0	5	2	2	2	13	10	3	5 (30 Aug)	18	5	23 Apr	5 Nov
45.	Common/Arctic Tern	263	0	0	519	2937	20403	0	0	24122	22903	1219	7743 ( 3 Sep)	46	13	23 Apr	17 Sep
46.	Common Tern	0	0	0	0	0	230	6	0	236	234	2	230 (23 Sep)	7	2	23 Sep	12 Oct
47.	Sandwich Tern	365	0	0	368	1319	3104	31	27	5214	4754	460	1191 ( 3 Sep)	82	23	23 Apr	12 Nov
48.	Little Gull	21	0	0	0	0	3	110	44	178	148	30	59 (29 Oct)	32	9	23 Apr	12 Nov
49.	Kittiwake	0	0	0	0	1	1	506	3	511	498	13	300 (27 Oct)	32	9	5 Aug	17 Nov
50.	Black-headed Gull	0	0	0	8	24	28	213	520	793	787	6	206 (17 Nov)	71	20	7 Jul	21 Nov
51.	Mediterranean Gull	0	0	0	0	2	1	0	0	3	1	2	2 ( 2 Aug)	7	2	2 Aug	16 Sep
52.	Common Gull	3	0	0	9	63	29	56	2854	3014	2866	148	1680 (17 Nov)	64	18	23 Apr	21 Nov
53.	Caspian Gull	0	0	0	0	0	0	2	0	2	2	0	1 (27 Oct)	7	2	27 Oct	29 Oct
54.	Herring Gull	0	0	0	2	37	35	21	210	305	190	115	118 (17 Nov)	64	18	7 Jul	21 Nov
55.	Great Black-backed Gull	0	0	0	0	2	20	13	27	62	43	19	18 (17 Nov)	32	9	5 Aug	21 Nov
56.	Lesser Black-backed Gull	52	0	0	86	1643	2950	176	371	5278	5060	218	841 ( 2 Aug)	86	24	23 Apr	21 Nov
57.	large gull sp.	0	0	0	500	0	0	0	0	500	0	500	500 ( 7 Jul)	4	1	7 Jul	7 Jul
58.	Long-tailed Skua	0	0	0	0	0	2	0	0	2	2	0	2 (16 Sep)	4	1	16 Sep	16 Sep
59.	skua sp.	0	0	0	0	0	1	3	0	4	4	0	2 (27 Oct)	11	3	15 Sep	27 Oct
60.	Arctic Skua	0	0	0	0	4	65	13	0	82	73	9	21 (15 Sep)	43	12	30 Aug	29 Oct
	Species	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
61.	Pomarine Skua	0	0	0	0	1	5	2	0	8	8	0	2 (23 Sep)	25	7	30 Aug	29 Oct
62.	Great Skua	0	0	0	0	0	6	1	1	8	7	1	6 (16 Sep)	11	3	16 Sep	5 Nov
63.	Razorbill	0	0	0	0	0	1	2	1	4	4	0	1 ( 5 Sep)	14	4	5 Sep	2 Nov
64.	Razorbill/Guillemot	0	0	0	0	0	4	14	47	65	46	19	21 ( 5 Nov)	29	8	23 Sep	21 Nov
65.	Little Auk	0	0	0	0	0	0	1	0	1	1	0	1 (27 Oct)	4	1	27 Oct	27 Oct
66.	Guillemot	0	0	0	0	0	1	2	7	10	5	5	6 (17 Nov)	14	4	17 Sep	17 Nov
67.	Red-throated Diver	0	0	0	0	0	5	8	227	240	231	9	123 (21 Nov)	43	12	12 Sep	21 Nov
68.	diver sp.	0	0	0	0	0	0	2	12	14	14	0	6 ( 5 Nov)	14	4	29 Oct	17 Nov
69.	Fulmar	0	0	0	0	1	0	0	0	1	1	0	1 ( 5 Aug)	4	1	5 Aug	5 Aug
70.	Sooty Shearwater	0	0	0	0	0	58	6	0	64	64	0	56 (16 Sep)	18	5	5 Sep	27 Oct
71.	Manx Shearwater	0	0	0	0	0	122	0	0	122	121	1	119 (16 Sep)	11	3	12 Sep	16 Sep
72.	Balearic Shearwater	0	0	0	0	0	1	0	0	1	1	0	1 (16 Sep)	4	1	16 Sep	16 Sep
73.	Gannet	0	0	0	2	20	107	295	595	1019	845	174	215 ( 5 Nov)	86	24	7 Jul	21 Nov
74.	Cormorant	2	0	0	76	17	53	111	393	652	528	124	140 ( 5 Nov)	79	22	23 Apr	21 Nov
75.	Grey Heron	0	0	0	0	0	0	1	3	4	4	0	3 ( 5 Nov)	7	2	29 Oct	5 Nov
76.	Sparrowhawk	0	0	0	0	0	0	1	3	4	4	0	3 ( 5 Nov)	7	2	29 Oct	5 Nov
77.	Goshawk	0	0	0	0	0	0	1	0	1	0	1	1 (29 Oct)	4	1	29 Oct	29 Oct
78.	Hen Harrier	0	0	0	0	0	0	0	1	1	1	0	1 ( 5 Nov)	4	1	5 Nov	5 Nov
79.	Merlin	0	0	0	0	0	0	1	0	1	0	1	1 (29 Oct)	4	1	29 Oct	29 Oct
80.	Peregrine	0	0	0	0	0	2	0	0	2	2	0	1 ( 5 Sep)	7	2	5 Sep	12 Sep
81.	Jackdaw	0	0	0	0	0	4	0	0	4	4	0	4 ( 5 Sep)	4	1	5 Sep	5 Sep
82.	Blue Tit	0	0	0	0	0	0	2	2	4	4	0	2 (29 Oct)	7	2	29 Oct	8 Nov
83.	Swallow	1	0	0	0	0	13	0	0	14	13	1	13 ( 5 Sep)	7	2	23 Apr	5 Sep
84.	Starling	0	0	0	0	0	0	7275	3395	10670	10664	6	7273 (29 Oct)	29	8	27 Oct	21 Nov
85.	Blue-headed Wagtail	1	0	0	0	0	0	0	0	1	0	1	1 (23 Apr)	4	1	23 Apr	23 Apr
86.	Grey Wagtail	0	0	0	0	0	0	1	0	1	1	0	1 (29 Oct)	4	1	29 Oct	29 Oct
87.	White Wagtail	0	0	0	0	0	2	2	0	4	4	0	2 ( 5 Sep)	7	2	5 Sep	29 Oct
88.	Meadow Pipit	0	0	0	0	0	2	18	22	42	41	1	16 ( 5 Nov)	18	5	23 Sep	5 Nov
89.	Chaffinch	0	0	0	0	0	0	49	805	854	854	0	560 ( 2 Nov)	14	4	29 Oct	12 Nov
90.	Linnet	0	0	0	0	0	0	0	18	18	18	0	17 (21 Nov)	7	2	8 Nov	21 Nov
	Species	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
91.	Siskin	0	0	0	0	0	0	30	17	47	47	0	30 (29 Oct)	11	3	29 Oct	8 Nov
	Other species
	Species	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
1.	Harbour Porpoise	0	0	0	0	0	1	0	0	1	1	0	1 (17 Sep)	4	1	17 Sep	17 Sep
2.	Grey seal	0	0	0	0	0	0	1	0	1	1	0	1 ( 9 Oct)	4	1	9 Oct	9 Oct
3.	Common Seal	0	0	0	0	0	1	0	1	2	2	0	1 (23 Sep)	7	2	23 Sep	5 Nov
	Species	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
	Totals	747	0	0	1572	6179	29302	9414	9893	57107	53828	3279		100	28
	Observation hours	1:00	0:00	0:00	2:00	9:41	38:40	17:02	17:45	86:08

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Trektellen

Totals Maasvlakte II 2025