Also present

Totals Maasvlakte II 2021

	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
1.	Dark-bellied Brent Goose	23	0	286	54	107	0	0	0	112	1766	54	1	2403	1936	467	1324 (12 Oct)	33	27	12 Jan	3 Dec
2.	Canada Goose	0	0	5	0	0	0	0	0	0	0	0	0	5	5	0	5 (14 Mar)	1	1	14 Mar	14 Mar
3.	Barnacle Goose	65	0	0	0	0	0	0	0	0	0	0	0	65	0	65	65 ( 3 Jan)	1	1	3 Jan	3 Jan
4.	Greylag Goose	0	5	5	2	14	0	0	0	0	15	0	1	42	31	11	13 (31 Oct)	11	9	21 Feb	26 Dec
5.	goose sp.	0	0	0	0	0	0	0	0	0	0	25	0	25	25	0	25 (21 Nov)	1	1	21 Nov	21 Nov
6.	Mute Swan	0	0	0	2	0	0	0	0	0	0	0	0	2	2	0	2 (18 Apr)	1	1	18 Apr	18 Apr
7.	Whooper Swan	0	0	0	0	0	0	0	0	0	3	0	0	3	3	0	3 (26 Oct)	1	1	26 Oct	26 Oct
8.	Egyptian Goose	0	0	0	6	0	0	0	1	0	0	0	8	15	3	12	8 ( 5 Dec)	4	3	25 Apr	5 Dec
9.	Shelduck	0	0	0	4	8	0	0	9	0	1	6	0	28	15	13	7 ( 9 May)	12	10	4 Apr	21 Nov
10.	Garganey	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (15 Sep)	1	1	15 Sep	15 Sep
11.	Shoveler	0	0	0	16	2	0	0	0	16	0	0	0	34	18	16	16 ( 8 Apr)	4	3	8 Apr	15 Sep
12.	Gadwall	0	0	0	0	0	0	0	2	8	0	0	0	10	10	0	5 (30 Sep)	4	3	14 Aug	30 Sep
13.	Wigeon	20	2	25	0	0	0	0	0	150	152	6	0	355	323	32	123 ( 6 Oct)	13	11	24 Jan	29 Nov
14.	Pintail	0	0	0	0	0	0	0	0	18	9	30	0	57	57	0	30 (21 Nov)	7	6	15 Sep	21 Nov
15.	Teal	0	0	19	1	0	0	0	24	140	11	1	0	196	174	22	76 (15 Sep)	18	15	21 Mar	7 Nov
16.	duck sp.	1	0	16	0	0	0	0	0	0	0	12	0	29	28	1	16 ( 7 Mar)	4	3	3 Jan	21 Nov
17.	Tufted Duck	0	0	0	0	0	0	0	0	0	3	0	0	3	3	0	3 (12 Oct)	1	1	12 Oct	12 Oct
18.	Eider	2	4	48	27	0	0	0	0	4	10	12	9	116	53	63	36 ( 7 Mar)	27	22	21 Jan	19 Dec
19.	Velvet Scoter	5	0	5	11	0	0	0	1	0	1	2	0	25	8	17	4 (21 Mar)	12	10	12 Jan	7 Nov
20.	Common Scoter	265	19	176	1752	303	0	184	206	549	515	121	112	4202	1650	2552	678 (18 Apr)	91	75	10 Jan	26 Dec
21.	Long-tailed Duck	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (29 Sep)	1	1	29 Sep	29 Sep
22.	Goldeneye	1	0	0	0	0	0	0	0	0	1	0	0	2	2	0	1 (19 Jan)	2	2	19 Jan	22 Oct
23.	Red-breasted Merganser	6	1	36	26	4	0	0	0	29	87	11	4	204	159	45	33 ( 6 Oct)	44	36	21 Jan	26 Dec
24.	Great Crested Grebe	23	1	9	2	1	0	0	4	13	9	12	3	77	61	16	8 (17 Nov)	41	34	3 Jan	26 Dec
25.	Oystercatcher	2	3	0	0	8	0	0	33	11	4	1	2	64	59	5	10 (18 Aug)	23	19	3 Jan	12 Dec
26.	Grey Plover	0	0	13	23	6	0	0	46	9	9	0	0	106	69	37	19 (18 Apr)	22	18	11 Mar	22 Oct
27.	Golden Plover	0	0	0	0	0	0	0	0	5	0	0	0	5	5	0	5 (24 Sep)	1	1	24 Sep	24 Sep
28.	Ringed Plover	0	0	0	0	0	0	0	20	24	5	0	0	49	49	0	13 (24 Sep)	12	10	17 Aug	6 Oct
29.	Whimbrel	0	0	0	3	1	0	2	50	0	2	0	0	58	51	7	15 (16 Aug)	12	10	21 Apr	12 Oct
30.	Curlew	0	0	0	1	4	0	0	1	6	3	1	0	16	10	6	3 (16 May)	12	10	25 Apr	17 Nov
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
31.	Bar-tailed Godwit	0	0	0	94	9	0	0	1	7	2	0	1	114	11	103	83 (21 Apr)	11	9	11 Apr	1 Dec
32.	Black-tailed Godwit	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (23 Sep)	1	1	23 Sep	23 Sep
33.	Redshank	0	0	0	0	1	0	0	1	0	0	0	0	2	1	1	1 ( 9 May)	2	2	9 May	17 Aug
34.	Turnstone	0	0	0	0	0	0	0	11	0	2	0	0	13	13	0	6 (26 Aug)	6	5	15 Aug	21 Oct
35.	Knot	0	0	0	36	166	0	0	0	4	0	0	0	206	40	166	166 ( 2 May)	5	4	11 Apr	29 Sep
36.	wader sp.	0	0	35	15	0	0	3	9	24	9	6	0	101	44	57	35 ( 7 Mar)	12	10	7 Mar	1 Nov
37.	Curlew Sandpiper	0	0	0	0	0	0	0	2	0	0	0	0	2	2	0	2 (16 Aug)	1	1	16 Aug	16 Aug
38.	Sanderling	0	0	1	0	21	0	0	29	38	32	12	0	133	113	20	20 ( 2 May)	24	20	11 Mar	21 Nov
39.	Dunlin	0	6	0	0	82	0	9	143	49	36	7	0	332	236	96	89 (16 Aug)	23	19	21 Feb	17 Nov
40.	Purple Sandpiper	0	0	0	0	0	0	0	1	2	2	0	0	5	5	0	2 (15 Sep)	5	4	17 Aug	22 Oct
41.	Little Stint	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (29 Sep)	1	1	29 Sep	29 Sep
42.	Little Tern	0	0	0	7	10	0	23	29	2	0	0	0	71	62	9	22 (31 Jul)	13	11	21 Apr	12 Sep
43.	Black Tern	0	0	0	1	0	0	1	1549	2	0	0	0	1553	1551	2	1518 (16 Aug)	13	11	7 Apr	15 Sep
44.	Arctic Tern	0	0	0	8	2	0	0	2	25	2	3	0	42	32	10	20 (15 Sep)	9	7	18 Apr	1 Nov
45.	Common/Arctic Tern	0	0	0	1	0	0	0	0	151	0	0	0	152	152	0	150 (29 Sep)	4	3	7 Apr	29 Sep
46.	Common Tern	0	0	0	513	684	0	1364	16817	674	8	5	0	20065	18774	1291	5318 (16 Aug)	44	36	4 Apr	1 Nov
47.	Sandwich Tern	0	0	14	302	331	0	636	3380	4850	1627	0	0	11140	8879	2261	1403 (23 Sep)	59	48	21 Mar	31 Oct
48.	Little Gull	0	0	3	593	1	0	0	6	23	451	17	0	1094	488	606	482 (21 Apr)	35	29	11 Mar	21 Nov
49.	Kittiwake	221	0	1	39	1	0	0	23	2	789	565	43	1684	1554	130	265 (21 Oct)	55	45	3 Jan	26 Dec
50.	Sabine's Gull	0	0	0	0	0	0	0	2	0	3	0	0	5	5	0	1 (16 Aug)	6	5	16 Aug	27 Oct
51.	Black-headed Gull	2	0	20	16	0	0	94	276	81	527	470	5	1491	1448	43	370 (21 Nov)	51	42	19 Jan	19 Dec
52.	Mediterranean Gull	0	0	0	0	0	0	5	2	2	1	0	0	10	10	0	5 (31 Jul)	5	4	31 Jul	2 Oct
53.	Common Gull	29	0	48	16	0	0	26	65	103	278	734	42	1341	1254	87	336 (21 Nov)	50	41	19 Jan	26 Dec
54.	Herring Gull	7	0	7	2	0	0	50	7	55	61	11	18	218	200	18	54 (15 Sep)	29	24	12 Jan	19 Dec
55.	Great Black-backed Gull	81	0	2	0	0	0	0	0	25	102	39	35	284	262	22	95 (22 Oct)	30	25	20 Jan	26 Dec
56.	Lesser Black-backed Gull	2	0	252	23	0	0	191	1812	75	150	35	0	2540	2295	245	600 ( 9 Aug)	41	34	21 Jan	29 Nov
57.	Laridae sp.	0	0	1	0	1	0	0	0	0	0	0	0	2	1	1	1 (11 Mar)	2	2	11 Mar	5 May
58.	Long-tailed Skua	0	0	0	0	0	0	0	5	7	1	0	0	13	11	2	5 (29 Sep)	9	7	26 Aug	6 Oct
59.	skua sp.	0	0	0	0	0	0	0	4	1	2	1	0	8	6	2	2 (18 Aug)	7	6	18 Aug	7 Nov
60.	Arctic Skua	0	0	0	4	0	0	0	63	343	144	2	0	556	466	90	104 (29 Sep)	43	35	6 Apr	7 Nov
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
61.	Pomarine Skua	0	0	0	0	0	0	0	1	7	10	0	0	18	14	4	4 ( 6 Oct)	11	9	26 Aug	26 Oct
62.	Great Skua	0	0	0	1	0	0	1	5	8	6	0	0	21	19	2	3 (23 Sep)	16	13	7 Apr	27 Oct
63.	Razorbill	20	0	0	0	0	0	0	0	6	4	1	3	34	32	2	15 (20 Jan)	15	12	12 Jan	5 Dec
64.	Razorbill/Guillemot	1870	1	4	6	0	0	0	0	266	426	1078	78	3729	2890	839	618 (31 Jan)	66	54	3 Jan	26 Dec
65.	Little Auk	0	0	0	0	0	0	0	0	0	0	2	0	2	2	0	1 ( 7 Nov)	2	2	7 Nov	17 Nov
66.	Guillemot	0	0	0	0	0	0	0	1	25	16	13	7	62	53	9	12 (23 Sep)	20	16	29 Aug	26 Dec
67.	Red-throated Diver	283	6	59	25	0	0	0	0	260	272	934	226	2065	1747	318	567 (21 Nov)	73	60	10 Jan	26 Dec
68.	Black-throated Diver	2	0	1	13	0	0	0	0	3	4	4	0	27	13	14	11 ( 7 Apr)	17	14	17 Jan	21 Nov
69.	diver sp.	9	0	11	26	1	0	0	0	0	2	0	37	86	33	53	31 ( 5 Dec)	15	12	17 Jan	19 Dec
70.	Leach's Petrel	0	0	0	0	0	0	0	0	8	12	0	0	20	20	0	7 (29 Sep)	5	4	23 Sep	21 Oct
71.	Fulmar	0	0	0	20	1	0	0	0	0	0	0	0	21	3	18	20 ( 7 Apr)	2	2	7 Apr	5 May
72.	Sooty Shearwater	1	0	0	0	0	0	0	6	31	18	0	0	56	52	4	16 (29 Sep)	11	9	10 Jan	22 Oct
73.	Manx Shearwater	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (15 Sep)	1	1	15 Sep	15 Sep
74.	shearwater sp.	0	0	0	0	0	0	1	0	1	0	0	0	2	1	1	1 (31 Jul)	2	2	31 Jul	23 Sep
75.	Gannet	386	9	33	90	14	0	73	63	333	469	658	263	2391	1911	480	323 ( 7 Nov)	87	71	19 Jan	26 Dec
76.	Cormorant	14	13	44	59	78	0	835	457	81	164	17	873	2635	1681	954	860 (26 Dec)	66	54	3 Jan	26 Dec
77.	Great White Egret	0	0	0	0	0	0	0	0	0	4	0	0	4	4	0	4 (26 Oct)	1	1	26 Oct	26 Oct
78.	Grey Heron	0	0	0	0	0	0	0	0	5	7	0	0	12	12	0	4 ( 6 Oct)	6	5	13 Sep	23 Oct
79.	Sparrowhawk	0	0	0	0	0	0	0	0	1	1	0	0	2	2	0	1 (15 Sep)	2	2	15 Sep	2 Oct
80.	Marsh Harrier	0	0	0	0	0	0	0	0	0	1	0	0	1	1	0	1 (17 Oct)	1	1	17 Oct	17 Oct
81.	Common Buzzard	0	0	0	0	0	0	0	0	0	2	0	0	2	2	0	2 (26 Oct)	1	1	26 Oct	26 Oct
82.	Short-eared Owl	0	0	0	0	0	0	0	0	0	3	0	0	3	3	0	3 (12 Oct)	1	1	12 Oct	12 Oct
83.	Kestrel	0	0	0	0	1	0	0	0	1	0	0	0	2	2	0	1 ( 9 May)	2	2	9 May	15 Sep
84.	Merlin	0	0	0	0	0	0	0	0	0	2	0	0	2	1	1	1 ( 2 Oct)	2	2	2 Oct	17 Oct
85.	Peregrine	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (29 Sep)	1	1	29 Sep	29 Sep
86.	Carrion Crow	0	0	2	0	0	0	0	0	0	1	0	0	3	0	3	2 (28 Mar)	2	2	28 Mar	17 Oct
87.	Skylark	0	2	0	0	0	0	0	0	0	8	0	0	10	10	0	6 (26 Oct)	4	3	21 Feb	26 Oct
88.	Sand Martin	0	0	0	0	6	0	0	0	0	0	0	0	6	6	0	6 ( 9 May)	1	1	9 May	9 May
89.	Swallow	0	0	0	0	71	0	0	0	2	0	0	0	73	73	0	71 ( 9 May)	2	2	9 May	29 Sep
90.	Whitethroat	0	0	0	0	0	0	0	0	0	1	0	0	1	1	0	1 (10 Oct)	1	1	10 Oct	10 Oct
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
91.	Starling	0	0	4	0	0	0	0	0	0	325	2001	0	2330	2323	7	1890 ( 8 Nov)	10	8	28 Mar	21 Nov
92.	Whinchat	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (15 Sep)	1	1	15 Sep	15 Sep
93.	Blue-headed Wagtail	0	0	0	0	0	0	0	0	1	2	0	0	3	3	0	2 ( 2 Oct)	2	2	14 Sep	2 Oct
94.	Yellow wagtail sp.	0	0	0	0	1	0	0	0	0	0	0	0	1	0	1	1 ( 9 May)	1	1	9 May	9 May
95.	Grey Wagtail	0	0	0	0	0	0	0	0	0	1	0	0	1	1	0	1 (26 Oct)	1	1	26 Oct	26 Oct
96.	White Wagtail	0	0	3	1	0	0	0	0	12	5	0	0	21	19	2	7 (28 Sep)	10	8	12 Mar	26 Oct
97.	alba wagtail sp.	0	0	0	0	1	0	0	0	0	0	0	0	1	0	1	1 ( 9 May)	1	1	9 May	9 May
98.	Meadow Pipit	0	0	3	0	2	0	0	0	21	54	0	1	81	76	5	29 ( 2 Oct)	13	11	7 Mar	5 Dec
99.	Rock Pipit	0	0	0	0	0	0	0	0	0	3	0	0	3	3	0	2 (26 Oct)	2	2	26 Oct	27 Oct
100.	Chaffinch	0	0	0	0	0	0	0	0	0	48	0	0	48	48	0	20 (31 Oct)	5	4	2 Oct	31 Oct
101.	Brambling	0	0	0	0	0	0	0	0	0	1	0	0	1	1	0	1 ( 2 Oct)	1	1	2 Oct	2 Oct
102.	Linnet	0	0	0	7	3	0	0	0	16	3	0	0	29	19	10	9 (28 Sep)	9	7	8 Apr	2 Oct
103.	Siskin	0	0	0	0	0	0	0	0	0	30	0	0	30	30	0	30 (26 Oct)	1	1	26 Oct	26 Oct
104.	Lapland Bunting	0	1	0	0	0	0	0	0	0	0	2	0	3	2	1	2 (17 Nov)	2	2	21 Feb	17 Nov
	Other species
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
1.	Harbour Porpoise	0	0	1	0	0	0	0	0	1	5	1	1	9	5	4	3 (31 Oct)	7	6	21 Mar	3 Dec
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
	Totals	3340	73	1192	3848	1946	0	3498	25169	8735	8745	6912	1773	65231	53849	11382		100	82
	Observation hours	13:47	1:25	9:49	18:40	8:10	0:00	6:08	38:02	57:10	45:42	18:07	8:22	225:22

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Trektellen

Totals Maasvlakte II 2021