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Totals Castricum aan Zee (zeetrek) 2025

	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
1.	Dark-bellied Brent Goose	17	130	1156	1069	1277	0	0	3649	70	3579	825 (21 May)	60	34	2 Jan	21 May
2.	Pale-bellied Brent Goose	0	0	0	1	0	0	0	1	0	1	1 ( 5 Apr)	2	1	5 Apr	5 Apr
3.	Canada Goose	0	2	19	21	1	0	0	43	19	24	13 (30 Apr)	19	11	26 Feb	5 May
4.	Barnacle Goose	187	103	3491	1465	865	0	0	6111	574	5537	1475 ( 8 Mar)	42	24	22 Jan	13 May
5.	Greylag Goose	3	57	254	201	116	0	0	631	183	448	91 ( 9 Mar)	65	37	22 Jan	13 May
6.	Pink-footed Goose	134	263	0	0	0	0	0	397	36	361	263 (26 Feb)	5	3	22 Jan	26 Feb
7.	Eurasian White-fronted Goose	5	46	0	0	0	0	0	51	1	50	46 (26 Feb)	5	3	22 Jan	26 Feb
8.	Mute Swan	0	0	0	0	21	0	0	21	12	9	7 ( 5 May)	7	4	5 May	11 May
9.	Egyptian Goose	2	14	70	94	25	2	0	207	49	158	28 (21 Mar)	51	29	22 Jan	8 Jun
10.	Shelduck	7	10	129	145	322	5	3	621	40	581	172 (21 May)	77	44	2 Jan	5 Jul
11.	Garganey	0	0	13	5	0	0	0	18	2	16	8 (21 Mar)	9	5	21 Mar	26 Apr
12.	Shoveler	0	2	724	1083	6	0	0	1815	101	1714	357 ( 4 Apr)	46	26	18 Feb	11 May
13.	Gadwall	0	14	28	32	6	0	0	80	18	62	16 ( 6 Apr)	33	19	15 Feb	21 May
14.	Wigeon	355	386	1591	72	2	0	0	2406	385	2021	913 (29 Mar)	53	30	2 Jan	3 May
15.	Mallard	0	0	3	1	0	0	0	4	0	4	2 (20 Mar)	5	3	8 Mar	4 Apr
16.	Pintail	1	11	120	30	2	0	0	164	3	161	39 ( 8 Mar)	30	17	22 Jan	13 May
17.	Teal	21	52	2314	939	22	0	0	3348	100	3248	683 ( 8 Mar)	63	36	2 Jan	13 May
18.	duck sp.	0	0	10	0	0	0	0	10	0	10	10 ( 8 Mar)	2	1	8 Mar	8 Mar
19.	Pochard	0	0	0	5	1	0	0	6	0	6	3 ( 3 Apr)	5	3	3 Apr	11 May
20.	Tufted Duck	2	0	7	21	8	0	0	38	4	34	15 (30 Apr)	18	10	22 Jan	13 May
21.	Scaup	0	2	11	0	0	0	0	13	0	13	6 ( 9 Mar)	5	3	18 Feb	30 Mar
22.	Aythya sp.	1	0	0	0	0	0	0	1	0	1	1 (26 Jan)	2	1	26 Jan	26 Jan
23.	Eider	14	52	369	197	87	7	0	726	328	398	90 (26 Mar)	88	50	2 Jan	8 Jun
24.	Velvet Scoter	28	0	13	3	0	0	0	44	28	16	27 ( 2 Jan)	11	6	2 Jan	4 Apr
25.	Common Scoter	393	351	4638	2875	2508	30	2	10797	2835	7962	1348 (29 Mar)	100	57	2 Jan	5 Jul
26.	Goldeneye	0	0	5	0	0	0	0	5	3	2	3 (19 Mar)	4	2	9 Mar	19 Mar
27.	Smew	3	0	0	0	0	0	0	3	3	0	2 (22 Jan)	4	2	11 Jan	22 Jan
28.	Goosander	0	0	6	0	0	0	0	6	0	6	4 (20 Mar)	4	2	9 Mar	20 Mar
29.	Red-breasted Merganser	0	6	222	218	10	0	0	456	23	433	58 ( 8 Apr)	56	32	6 Feb	11 May
30.	Swift	0	0	0	1	6	0	0	7	1	6	6 (13 May)	4	2	26 Apr	13 May
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
31.	Red-necked Grebe	1	1	0	0	0	0	0	2	2	0	1 (22 Jan)	4	2	22 Jan	15 Feb
32.	Great Crested Grebe	212	49	43	27	35	4	0	370	260	110	181 (22 Jan)	68	39	2 Jan	8 Jun
33.	Greater Flamingo	0	0	0	0	3	0	0	3	0	3	3 (21 May)	2	1	21 May	21 May
34.	Oystercatcher	0	20	114	346	341	2	0	823	248	575	89 (10 May)	77	44	15 Feb	8 Jun
35.	Avocet	0	0	389	31	28	0	0	448	3	445	173 (20 Mar)	30	17	8 Mar	13 May
36.	Grey Plover	0	0	47	189	825	0	0	1061	0	1061	405 ( 5 May)	46	26	11 Mar	21 May
37.	Golden Plover	0	0	0	1	3	0	0	4	0	4	2 ( 4 May)	5	3	27 Apr	10 May
38.	Ringed Plover	0	1	5	11	314	0	0	331	0	331	191 (11 May)	26	15	18 Feb	21 May
39.	Little Ringed Plover	0	0	0	2	0	0	0	2	0	2	1 ( 4 Apr)	4	2	4 Apr	27 Apr
40.	Kentish Plover	0	0	0	2	0	0	0	2	0	2	2 ( 6 Apr)	2	1	6 Apr	6 Apr
41.	Whimbrel	0	0	0	226	108	0	10	344	10	334	69 ( 4 Apr)	39	22	3 Apr	5 Jul
42.	Curlew	0	4	40	44	3	0	0	91	5	86	33 (16 Apr)	37	21	15 Feb	5 May
43.	Bar-tailed Godwit	0	0	21	677	221	0	1	920	1	919	378 (21 Apr)	37	21	21 Mar	5 Jul
44.	Black-tailed Godwit	0	0	4	1	0	0	0	5	4	1	4 ( 8 Mar)	4	2	8 Mar	30 Apr
45.	Snipe	0	0	1	0	0	0	0	1	0	1	1 (19 Mar)	2	1	19 Mar	19 Mar
46.	Common Sandpiper	0	0	0	6	0	0	0	6	0	6	6 (30 Apr)	2	1	30 Apr	30 Apr
47.	Redshank	0	0	5	58	108	0	0	171	1	170	67 (11 May)	25	14	11 Mar	11 May
48.	Spotted Redshank	0	0	0	1	4	0	0	5	0	5	4 (11 May)	4	2	26 Apr	11 May
49.	Greenshank	0	0	0	46	2	0	0	48	0	48	19 (21 Apr)	11	6	19 Apr	5 May
50.	Turnstone	0	0	1	11	62	0	0	74	1	73	53 ( 5 May)	12	7	20 Mar	21 May
51.	Knot	0	0	4	152	2476	0	0	2632	0	2632	2006 ( 5 May)	30	17	15 Mar	21 May
52.	Ruff	0	0	1	25	0	0	0	26	0	26	19 ( 6 Apr)	7	4	9 Mar	30 Apr
53.	wader sp.	0	0	3	2	2	0	0	7	0	7	3 (15 Mar)	5	3	15 Mar	5 May
54.	small wader	0	0	0	2	0	0	0	2	0	2	2 (19 Apr)	2	1	19 Apr	19 Apr
55.	Curlew Sandpiper	0	0	0	0	4	0	0	4	0	4	3 ( 5 May)	4	2	5 May	11 May
56.	Temminck's Stint	0	0	0	0	1	0	0	1	0	1	1 (11 May)	2	1	11 May	11 May
57.	Sanderling	3	23	198	400	804	0	0	1428	4	1424	190 ( 5 May)	56	32	11 Jan	21 May
58.	Dunlin	0	182	2096	4739	143	0	0	7160	14	7146	2852 ( 4 Apr)	63	36	5 Feb	21 May
59.	Purple Sandpiper	0	0	0	2	0	0	0	2	0	2	1 ( 4 Apr)	4	2	4 Apr	8 Apr
60.	Little Stint	0	0	0	1	1	0	0	2	0	2	1 ( 4 Apr)	4	2	4 Apr	7 May
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
61.	Calidris sp.	0	3	0	20	79	0	0	102	0	102	32 (13 May)	9	5	5 Feb	13 May
62.	Little Tern	0	0	1	199	131	4	0	335	12	323	75 (26 Apr)	32	18	31 Mar	4 Jun
63.	Gull-billed Tern	0	0	0	0	2	0	0	2	0	2	2 (10 May)	2	1	10 May	10 May
64.	Black Tern	0	0	0	83	194	0	0	277	0	277	54 ( 5 May)	25	14	8 Apr	21 May
65.	White-winged Black Tern	0	0	0	0	2	0	0	2	0	2	2 (10 May)	2	1	10 May	10 May
66.	Arctic Tern	0	0	0	23	72	14	0	109	0	109	28 ( 4 May)	12	7	19 Apr	8 Jun
67.	Common/Arctic Tern	0	0	0	2518	7220	88	66	9892	1347	8545	2268 ( 3 May)	37	21	5 Apr	5 Jul
68.	Common Tern	0	0	0	1032	70	79	0	1181	417	764	877 (21 Apr)	23	13	2 Apr	8 Jun
69.	Sandwich Tern	0	0	91	4243	1213	202	41	5790	1753	4037	820 (30 Apr)	68	39	9 Mar	5 Jul
70.	Little Gull	0	5	313	6591	115	0	1	7025	67	6958	2835 (21 Apr)	54	31	5 Feb	5 Jul
71.	Kittiwake	0	16	4	0	0	0	0	20	14	6	16 ( 5 Feb)	7	4	5 Feb	31 Mar
72.	Black-headed Gull	102	99	1600	2334	2032	1	160	6328	784	5544	1094 (11 May)	91	52	2 Jan	5 Jul
73.	Mediterranean Gull	0	0	5	13	8	1	0	27	6	21	3 (30 Apr)	30	17	9 Mar	4 Jun
74.	Common Gull	49	266	2626	3950	1584	2	25	8502	450	8052	586 ( 2 Apr)	86	49	2 Jan	5 Jul
75.	Caspian Gull	0	0	4	0	0	0	0	4	1	3	1 ( 9 Mar)	7	4	9 Mar	29 Mar
76.	Herring Gull	0	0	0	0	6	0	0	6	0	6	6 ( 8 May)	2	1	8 May	8 May
77.	Yellow-legged Gull	0	0	1	2	0	0	0	3	0	3	1 (23 Mar)	5	3	23 Mar	27 Apr
78.	Great Black-backed Gull	1	0	0	0	0	0	0	1	1	0	1 (31 Jan)	2	1	31 Jan	31 Jan
79.	Lesser Black-backed Gull	1	6	0	0	0	0	0	7	1	6	3 ( 5 Feb)	5	3	11 Jan	9 Feb
80.	Arctic Skua	0	0	0	0	2	1	0	3	1	2	1 (11 May)	5	3	11 May	8 Jun
81.	Razorbill/Guillemot	0	1	1	1	1	0	0	4	2	2	1 ( 5 Feb)	7	4	5 Feb	7 May
82.	Red-throated Diver	175	51	80	35	5	0	0	346	185	161	131 (22 Jan)	63	36	22 Jan	21 May
83.	Black-throated Diver	1	0	3	0	1	0	0	5	0	5	2 (26 Mar)	7	4	31 Jan	4 May
84.	diver sp.	187	194	176	63	2	0	0	622	197	425	91 (26 Feb)	56	32	2 Jan	5 May
85.	Gannet	29	14	240	31	35	11	5	365	110	255	64 (30 Mar)	77	44	2 Jan	5 Jul
86.	Cormorant	0	51	0	0	0	0	0	51	28	23	51 (18 Feb)	2	1	18 Feb	18 Feb
87.	Spoonbill	0	0	0	7	3	0	0	10	2	8	7 (27 Apr)	5	3	27 Apr	5 May
88.	Little Egret	0	0	0	0	1	0	0	1	0	1	1 (10 May)	2	1	10 May	10 May
89.	Great White Egret	0	0	0	0	4	0	0	4	0	4	3 (10 May)	4	2	3 May	10 May
90.	Grey Heron	0	0	5	4	5	0	0	14	0	14	4 (21 Mar)	12	7	19 Mar	13 May
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
91.	Osprey	0	0	0	0	1	0	0	1	0	1	1 ( 1 May)	2	1	1 May	1 May
92.	Kestrel	0	0	0	2	0	0	0	2	0	2	2 ( 4 Apr)	2	1	4 Apr	4 Apr
93.	Merlin	0	0	0	3	0	0	0	3	0	3	2 ( 4 Apr)	4	2	4 Apr	8 Apr
94.	Rook	0	0	1	1	0	0	0	2	1	1	1 ( 8 Mar)	4	2	8 Mar	4 Apr
95.	Carrion Crow	0	0	0	1	0	0	0	1	1	0	1 (27 Apr)	2	1	27 Apr	27 Apr
96.	Skylark	0	0	4	0	0	0	0	4	0	4	3 (23 Mar)	4	2	20 Mar	23 Mar
97.	Sand Martin	0	0	0	15	3	0	0	18	0	18	14 ( 4 Apr)	7	4	4 Apr	10 May
98.	Swallow	0	0	0	5	34	0	0	39	1	38	16 (11 May)	9	5	27 Apr	13 May
99.	House Martin	0	0	0	0	1	0	0	1	0	1	1 ( 5 May)	2	1	5 May	5 May
100.	Yellow Wagtail (flavissima)	0	0	0	0	1	0	0	1	0	1	1 (11 May)	2	1	11 May	11 May
101.	Yellow wagtail sp.	0	0	0	0	5	0	0	5	0	5	5 (11 May)	2	1	11 May	11 May
102.	alba wagtail sp.	0	0	5	0	6	0	0	11	0	11	6 (13 May)	4	2	20 Mar	13 May
103.	Pied Wagtail	0	0	2	0	0	0	0	2	1	1	1 (19 Mar)	4	2	19 Mar	23 Mar
104.	Rock Pipit	0	0	2	3	0	0	0	5	0	5	3 ( 5 Apr)	5	3	1 Mar	5 Apr
105.	Lesser Redpoll	0	0	0	1	0	0	0	1	0	1	1 (27 Apr)	2	1	27 Apr	27 Apr
106.	Siskin	0	0	0	0	1	0	0	1	0	1	1 (10 May)	2	1	10 May	10 May
107.	Snow Bunting	1	0	1	0	0	0	0	2	1	1	1 (11 Jan)	4	2	11 Jan	9 Mar
	Other species
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
1.	Harbour Porpoise	5	2	0	4	0	0	0	11	3	8	4 (22 Jan)	9	5	11 Jan	21 Apr
2.	Common Seal	0	0	1	1	1	0	0	3	0	3	1 (22 Mar)	5	3	22 Mar	3 May
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
	Totals	1940	2489	23331	36665	23613	453	314	88805	10757	78048		100	57
	Observation hours	7:30	11:00	35:50	37:40	25:30	4:00	1:50	123:20

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Totals Castricum aan Zee (zeetrek) 2025