Totals Castricum aan Zee (zeetrek) 2025

Year
Period
count-field
Also present

	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	17	130	1156	1069	1277	0	0	0	0	191	58	14	3912	319	3593	825 (21 May)	38	42	2 Jan	30 Dec
2.	Pale-bellied Brent Goose	0	0	0	1	0	0	0	0	0	0	0	0	1	0	1	1 (5 Apr)	1	1	5 Apr	5 Apr
3.	Canada Goose	0	2	19	21	1	0	0	0	0	0	0	0	43	19	24	13 (30 Apr)	10	11	26 Feb	5 May
4.	Barnacle Goose	187	103	3491	1465	865	0	0	0	0	0	4	14	6129	589	5540	1475 (8 Mar)	25	27	22 Jan	22 Dec
5.	Greylag Goose	3	57	254	201	116	0	0	13	0	0	0	14	658	207	451	91 (9 Mar)	35	39	22 Jan	22 Dec
6.	goose sp.	0	0	0	0	0	0	0	0	0	2	0	0	2	0	2	2 (26 Oct)	1	1	26 Oct	26 Oct
7.	Pink-footed Goose	134	263	0	0	0	0	0	0	0	0	0	0	397	36	361	263 (26 Feb)	3	3	22 Jan	26 Feb
8.	Tundra Bean Goose	0	0	0	0	0	0	0	0	0	0	0	3	3	3	0	2 (22 Dec)	2	2	12 Dec	22 Dec
9.	Eurasian White-fronted Goose	5	46	0	0	0	0	0	0	0	0	0	97	148	10	138	89 (22 Dec)	5	5	22 Jan	22 Dec
10.	Mute Swan	0	0	0	0	21	0	0	0	1	0	0	0	22	13	9	7 (5 May)	5	5	5 May	13 Sep
11.	Egyptian Goose	2	14	70	94	25	2	0	6	0	0	0	9	222	64	158	28 (21 Mar)	29	32	22 Jan	22 Dec
12.	Shelduck	7	10	129	145	322	5	157	408	313	152	0	0	1648	503	1145	172 (21 May)	64	70	2 Jan	29 Oct
13.	Garganey	0	0	13	5	0	0	0	1	0	0	0	0	19	2	17	8 (21 Mar)	5	6	21 Mar	23 Aug
14.	Shoveler	0	2	724	1083	6	0	0	8	13	0	1	0	1837	116	1721	357 (4 Apr)	29	32	18 Feb	16 Nov
15.	Gadwall	0	14	28	32	6	0	0	7	20	7	0	10	124	34	90	16 (6 Apr)	28	31	15 Feb	22 Dec
16.	Wigeon	355	386	1591	72	2	0	0	5	39	14	23	98	2585	487	2098	913 (29 Mar)	42	46	2 Jan	30 Dec
17.	Mallard	0	0	3	1	0	0	1	1	2	0	1	0	9	3	6	2 (20 Mar)	6	7	8 Mar	16 Nov
18.	Pintail	1	11	120	30	2	0	0	1	11	1	0	0	177	15	162	39 (8 Mar)	19	21	22 Jan	19 Oct
19.	Teal	21	52	2314	939	22	0	13	47	51	58	9	34	3560	229	3331	683 (8 Mar)	55	61	2 Jan	22 Dec
20.	duck sp.	0	0	10	0	0	0	0	1	6	0	12	6	35	24	11	12 (16 Nov)	5	6	8 Mar	3 Dec
21.	Pochard	0	0	0	5	1	0	0	1	0	0	1	0	8	1	7	3 (3 Apr)	5	5	3 Apr	22 Nov
22.	Tufted Duck	2	0	7	21	8	0	4	5	2	17	0	0	66	14	52	15 (30 Apr)	17	19	22 Jan	19 Oct
23.	Scaup	0	2	11	0	0	0	0	1	4	1	0	0	19	3	16	6 (9 Mar)	6	7	18 Feb	24 Oct
24.	Aythya sp.	1	0	0	0	0	0	0	0	0	0	0	0	1	0	1	1 (26 Jan)	1	1	26 Jan	26 Jan
25.	Eider	14	52	369	197	87	7	3	4	91	14	14	8	860	361	499	90 (26 Mar)	65	71	2 Jan	30 Dec
26.	Velvet Scoter	28	0	13	3	0	0	0	1	0	3	3	7	58	36	22	27 (2 Jan)	12	13	2 Jan	22 Dec
27.	Common Scoter	393	351	4638	2875	2508	30	220	395	332	375	318	1006	13441	4422	9019	1348 (29 Mar)	100	110	2 Jan	30 Dec
28.	Goldeneye	0	0	5	0	0	0	0	0	0	0	4	9	18	7	11	8 (22 Dec)	5	5	9 Mar	22 Dec
29.	Smew	3	0	0	0	0	0	0	0	0	0	0	6	9	3	6	6 (22 Dec)	3	3	11 Jan	22 Dec
30.	Goosander	0	0	6	0	0	0	0	4	0	0	0	2	12	6	6	4 (20 Mar)	4	4	9 Mar	22 Dec
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
31.	Red-breasted Merganser	0	6	222	218	10	0	0	0	0	23	8	4	491	45	446	58 (8 Apr)	40	44	6 Feb	30 Dec
32.	Swift	0	0	0	1	6	0	0	1	0	0	0	0	8	2	6	6 (13 May)	3	3	26 Apr	31 Aug
33.	Red-necked Grebe	1	1	0	0	0	0	0	1	0	0	1	0	4	2	2	1 (22 Jan)	4	4	22 Jan	9 Nov
34.	Great Crested Grebe	212	49	43	27	35	4	6	8	6	6	47	40	483	346	137	181 (22 Jan)	58	64	2 Jan	30 Dec
35.	Black-necked Grebe	0	0	0	0	0	0	0	1	0	0	0	0	1	0	1	1 (17 Aug)	1	1	17 Aug	17 Aug
36.	Black-necked / Slavonian Grebe	0	0	0	0	0	0	0	0	0	1	0	1	2	2	0	1 (6 Oct)	2	2	6 Oct	22 Dec
37.	Greater Flamingo	0	0	0	0	3	0	0	0	0	0	0	0	3	0	3	3 (21 May)	1	1	21 May	21 May
38.	Oystercatcher	0	20	114	346	341	2	14	79	14	3	7	2	942	273	669	89 (10 May)	65	71	15 Feb	30 Dec
39.	Avocet	0	0	389	31	28	0	9	0	0	0	0	0	457	3	454	173 (20 Mar)	17	19	8 Mar	23 Jul
40.	Grey Plover	0	0	47	189	825	0	0	15	21	12	0	0	1109	36	1073	405 (5 May)	34	37	11 Mar	29 Oct
41.	Golden Plover	0	0	0	1	3	0	0	2	21	0	0	0	27	23	4	18 (16 Sep)	5	6	27 Apr	17 Sep
42.	Dotterel	0	0	0	0	0	0	0	1	0	0	0	0	1	0	1	1 (17 Aug)	1	1	17 Aug	17 Aug
43.	Ringed Plover	0	1	5	11	314	0	0	40	22	1	0	0	394	43	351	191 (11 May)	25	27	18 Feb	4 Oct
44.	Little Ringed Plover	0	0	0	2	0	0	0	0	0	0	0	0	2	0	2	1 (4 Apr)	2	2	4 Apr	27 Apr
45.	Kentish Plover	0	0	0	2	0	0	0	0	0	0	0	0	2	0	2	2 (6 Apr)	1	1	6 Apr	6 Apr
46.	Whimbrel	0	0	0	226	108	0	14	22	5	0	0	0	375	41	334	69 (4 Apr)	30	33	3 Apr	16 Sep
47.	Curlew	0	4	40	44	3	0	8	10	6	2	0	0	117	25	92	33 (16 Apr)	30	33	15 Feb	29 Oct
48.	Bar-tailed Godwit	0	0	21	677	221	0	1	3	32	0	0	0	955	35	920	378 (21 Apr)	24	26	21 Mar	16 Sep
49.	Black-tailed Godwit	0	0	4	1	0	0	0	0	0	0	0	0	5	4	1	4 (8 Mar)	2	2	8 Mar	30 Apr
50.	Snipe	0	0	1	0	0	0	0	0	8	0	0	0	9	8	1	5 (5 Sep)	3	3	19 Mar	14 Sep
51.	Common Sandpiper	0	0	0	6	0	0	0	0	0	0	0	0	6	0	6	6 (30 Apr)	1	1	30 Apr	30 Apr
52.	Green Sandpiper	0	0	0	0	0	0	2	0	0	0	0	0	2	1	1	2 (19 Jul)	1	1	19 Jul	19 Jul
53.	Redshank	0	0	5	58	108	0	3	21	1	0	0	0	196	2	194	67 (11 May)	18	20	11 Mar	4 Sep
54.	Spotted Redshank	0	0	0	1	4	0	0	1	0	0	0	0	6	0	6	4 (11 May)	3	3	26 Apr	16 Aug
55.	Greenshank	0	0	0	46	2	0	1	1	0	0	0	0	50	2	48	19 (21 Apr)	7	8	19 Apr	31 Aug
56.	Turnstone	0	0	1	11	62	0	2	15	4	0	0	0	95	10	85	53 (5 May)	15	17	20 Mar	13 Sep
57.	Knot	0	0	4	152	2476	0	1	8	16	9	0	0	2666	30	2636	2006 (5 May)	23	25	15 Mar	29 Oct
58.	Ruff	0	0	1	25	0	0	0	0	0	0	0	0	26	0	26	19 (6 Apr)	4	4	9 Mar	30 Apr
59.	wader sp.	0	0	3	2	2	0	0	4	34	32	0	0	77	62	15	25 (22 Oct)	12	13	15 Mar	22 Oct
60.	small wader	0	0	0	2	0	0	4	0	0	0	0	0	6	4	2	4 (19 Jul)	2	2	19 Apr	19 Jul
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
61.	Curlew Sandpiper	0	0	0	0	4	0	0	0	0	0	0	0	4	0	4	3 (5 May)	2	2	5 May	11 May
62.	Temminck's Stint	0	0	0	0	1	0	0	0	0	0	0	0	1	0	1	1 (11 May)	1	1	11 May	11 May
63.	Sanderling	3	23	198	400	804	0	5	203	48	15	15	0	1714	72	1642	190 (5 May)	45	50	11 Jan	16 Nov
64.	Dunlin	0	182	2096	4739	143	0	9	43	81	36	2	1	7332	103	7229	2852 (4 Apr)	54	59	5 Feb	30 Dec
65.	Purple Sandpiper	0	0	0	2	0	0	0	0	0	0	0	0	2	0	2	1 (4 Apr)	2	2	4 Apr	8 Apr
66.	Little Stint	0	0	0	1	1	0	0	1	0	0	0	0	3	0	3	1 (4 Apr)	3	3	4 Apr	16 Aug
67.	Calidris sp.	0	3	0	20	79	0	0	43	19	10	1	0	175	46	129	32 (13 May)	13	14	5 Feb	16 Nov
68.	Little Tern	0	0	1	199	131	4	2	8	6	0	0	0	351	24	327	75 (26 Apr)	24	26	31 Mar	19 Sep
69.	Gull-billed Tern	0	0	0	0	2	0	0	0	0	0	0	0	2	0	2	2 (10 May)	1	1	10 May	10 May
70.	Caspian Tern	0	0	0	0	0	0	1	1	0	0	0	0	2	2	0	1 (19 Jul)	2	2	19 Jul	27 Aug
71.	Black Tern	0	0	0	83	194	0	4	40	21	0	0	0	342	52	290	54 (5 May)	28	31	8 Apr	17 Sep
72.	White-winged Black Tern	0	0	0	0	2	0	0	0	0	0	0	0	2	0	2	2 (10 May)	1	1	10 May	10 May
73.	Arctic Tern	0	0	0	23	72	14	0	0	0	2	0	0	111	2	109	28 (4 May)	8	9	19 Apr	29 Oct
74.	Common/Arctic Tern	0	0	0	2518	7220	88	1709	3066	3416	10	0	0	18027	8200	9827	2268 (3 May)	48	53	5 Apr	5 Oct
75.	Common Tern	0	0	0	1032	70	79	198	0	122	0	0	0	1501	667	834	877 (21 Apr)	15	16	2 Apr	16 Sep
76.	Sandwich Tern	0	0	91	4243	1213	202	384	2812	2129	60	3	0	11137	6065	5072	820 (30 Apr)	73	80	9 Mar	16 Nov
77.	Little Gull	0	5	313	6591	115	0	2	3	0	212	2	0	7243	238	7005	2835 (21 Apr)	41	45	5 Feb	22 Nov
78.	Kittiwake	0	16	4	0	0	0	2	1	0	142	27	2	194	148	46	94 (29 Oct)	13	14	5 Feb	3 Dec
79.	Black-headed Gull	102	99	1600	2334	2032	1	2940	484	76	378	41	88	10175	4120	6055	1232 (19 Jul)	87	96	2 Jan	30 Dec
80.	Mediterranean Gull	0	0	5	13	8	1	34	4	1	2	0	0	68	38	30	19 (19 Jul)	25	27	9 Mar	11 Oct
81.	Common Gull	49	266	2626	3950	1584	2	381	103	12	169	159	233	9534	1076	8458	586 (2 Apr)	84	92	2 Jan	30 Dec
82.	Caspian Gull	0	0	4	0	0	0	0	0	0	5	0	0	9	6	3	3 (5 Oct)	5	6	9 Mar	29 Oct
83.	Herring Gull	0	0	0	0	6	0	0	0	0	0	0	0	6	0	6	6 (8 May)	1	1	8 May	8 May
84.	Yellow-legged Gull	0	0	1	2	0	0	2	0	0	0	0	0	5	2	3	1 (23 Mar)	5	5	23 Mar	18 Jul
85.	Great Black-backed Gull	1	0	0	0	0	0	0	50	3	0	0	0	54	54	0	48 (18 Aug)	4	4	31 Jan	1 Sep
86.	Lesser Black-backed Gull	1	6	0	0	0	0	0	316	0	0	0	4	327	319	8	316 (15 Aug)	6	7	11 Jan	30 Dec
87.	Long-tailed Skua	0	0	0	0	0	0	0	0	3	0	0	0	3	3	0	2 (17 Sep)	2	2	16 Sep	17 Sep
88.	skua sp.	0	0	0	0	0	0	0	1	10	4	0	0	15	12	3	3 (16 Sep)	8	9	27 Aug	19 Oct
89.	Arctic Skua	0	0	0	0	2	1	0	12	36	23	0	0	74	48	26	16 (4 Oct)	18	20	11 May	24 Oct
90.	Pomarine Skua	0	0	0	0	0	0	0	0	1	6	0	0	7	4	3	3 (4 Oct)	5	5	16 Sep	24 Oct
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
91.	Great Skua	0	0	0	0	0	0	0	0	5	2	0	1	8	5	3	2 (12 Sep)	5	6	12 Sep	3 Dec
92.	Razorbill	0	0	0	0	0	0	0	0	0	3	0	2	5	3	2	2 (26 Oct)	4	4	4 Oct	22 Dec
93.	Razorbill/Guillemot	0	1	1	1	1	0	0	4	18	141	14	33	214	74	140	86 (19 Oct)	26	29	5 Feb	30 Dec
94.	alca / fratercula spec	0	0	0	0	0	0	0	0	0	1	0	0	1	0	1	1 (24 Oct)	1	1	24 Oct	24 Oct
95.	Little Auk	0	0	0	0	0	0	0	0	0	1	0	0	1	0	1	1 (29 Oct)	1	1	29 Oct	29 Oct
96.	Guillemot	0	0	0	0	0	0	0	0	8	0	0	0	8	7	1	4 (13 Sep)	3	3	5 Sep	17 Sep
97.	Red-throated Diver	175	51	80	35	5	0	0	2	4	21	8	24	405	224	181	131 (22 Jan)	46	51	22 Jan	30 Dec
98.	Black-throated Diver	1	0	3	0	1	0	0	0	0	0	0	0	5	0	5	2 (26 Mar)	4	4	31 Jan	4 May
99.	diver sp.	187	194	176	63	2	0	0	0	4	52	235	1526	2439	1903	536	801 (12 Dec)	48	53	2 Jan	30 Dec
100.	Leach's Petrel	0	0	0	0	0	0	0	0	1	1	0	0	2	2	0	1 (21 Sep)	2	2	21 Sep	4 Oct
101.	Fulmar	0	0	0	0	0	0	0	1	4	0	0	0	5	4	1	3 (16 Sep)	3	3	27 Aug	16 Sep
102.	Sooty Shearwater	0	0	0	0	0	0	0	0	28	19	1	0	48	41	7	13 (4 Oct)	6	7	12 Sep	30 Nov
103.	Manx Shearwater	0	0	0	0	0	0	0	0	31	1	0	0	32	28	4	24 (16 Sep)	5	6	14 Sep	4 Oct
104.	Gannet	29	14	240	31	35	11	76	168	583	942	259	501	2889	1913	976	285 (4 Oct)	83	91	2 Jan	30 Dec
105.	Cormorant	0	51	0	0	0	0	0	0	1953	7318	0	355	9677	8637	1040	3236 (6 Oct)	9	10	18 Feb	3 Dec
106.	Spoonbill	0	0	0	7	3	0	0	0	34	0	0	0	44	36	8	34 (19 Sep)	4	4	27 Apr	19 Sep
107.	Little Egret	0	0	0	0	1	0	1	0	0	0	0	0	2	1	1	1 (10 May)	2	2	10 May	26 Jul
108.	Great White Egret	0	0	0	0	4	0	0	0	0	0	0	0	4	0	4	3 (10 May)	2	2	3 May	10 May
109.	Grey Heron	0	0	5	4	5	0	6	2	1	0	0	0	23	7	16	4 (21 Mar)	10	11	19 Mar	5 Sep
110.	Osprey	0	0	0	0	1	0	0	0	1	0	0	0	2	1	1	1 (1 May)	2	2	1 May	14 Sep
111.	Kestrel	0	0	0	2	0	0	0	0	2	0	0	0	4	2	2	2 (4 Apr)	2	2	4 Apr	5 Sep
112.	Merlin	0	0	0	3	0	0	0	0	0	0	0	0	3	0	3	2 (4 Apr)	2	2	4 Apr	8 Apr
113.	Rook	0	0	1	1	0	0	0	0	0	0	0	0	2	1	1	1 (8 Mar)	2	2	8 Mar	4 Apr
114.	Carrion Crow	0	0	0	1	0	0	0	0	0	0	0	0	1	1	0	1 (27 Apr)	1	1	27 Apr	27 Apr
115.	Skylark	0	0	4	0	0	0	0	0	0	3	0	0	7	3	4	3 (23 Mar)	3	3	20 Mar	29 Oct
116.	Shore Lark	0	0	0	0	0	0	0	0	0	2	0	0	2	2	0	2 (29 Oct)	1	1	29 Oct	29 Oct
117.	Sand Martin	0	0	0	15	3	0	0	0	0	0	0	0	18	0	18	14 (4 Apr)	4	4	4 Apr	10 May
118.	Swallow	0	0	0	5	34	0	0	0	0	0	0	0	39	1	38	16 (11 May)	5	5	27 Apr	13 May
119.	House Martin	0	0	0	0	1	0	0	0	0	0	0	0	1	0	1	1 (5 May)	1	1	5 May	5 May
120.	Starling	0	0	0	0	0	0	0	0	0	4000	506	0	4506	4506	0	4000 (29 Oct)	2	2	29 Oct	22 Nov
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
121.	Blue-headed Wagtail	0	0	0	0	0	0	0	6	0	0	0	0	6	6	0	6 (21 Aug)	1	1	21 Aug	21 Aug
122.	Yellow Wagtail (flavissima)	0	0	0	0	1	0	0	0	0	0	0	0	1	0	1	1 (11 May)	1	1	11 May	11 May
123.	Yellow wagtail sp.	0	0	0	0	5	0	0	0	0	0	0	0	5	0	5	5 (11 May)	1	1	11 May	11 May
124.	Grey Wagtail	0	0	0	0	0	0	0	0	0	11	1	1	13	11	2	6 (11 Oct)	5	5	11 Oct	22 Dec
125.	alba wagtail sp.	0	0	5	0	6	0	0	0	0	1	0	0	12	1	11	6 (13 May)	3	3	20 Mar	29 Oct
126.	Pied Wagtail	0	0	2	0	0	0	0	0	0	0	0	0	2	1	1	1 (19 Mar)	2	2	19 Mar	23 Mar
127.	Meadow Pipit	0	0	0	0	0	0	0	0	0	3	0	0	3	3	0	3 (29 Oct)	1	1	29 Oct	29 Oct
128.	Water Pipit	0	0	0	0	0	0	0	0	0	2	0	0	2	1	1	2 (19 Oct)	1	1	19 Oct	19 Oct
129.	Rock Pipit	0	0	2	3	0	0	0	0	0	0	0	0	5	0	5	3 (5 Apr)	3	3	1 Mar	5 Apr
130.	Lesser Redpoll	0	0	0	1	0	0	0	0	0	0	0	0	1	0	1	1 (27 Apr)	1	1	27 Apr	27 Apr
131.	Siskin	0	0	0	0	1	0	0	0	0	0	0	0	1	0	1	1 (10 May)	1	1	10 May	10 May
132.	Snow Bunting	1	0	1	0	0	0	0	0	0	0	2	1	5	2	3	2 (16 Nov)	4	4	11 Jan	3 Dec
133.	Yellowhammer	0	0	0	0	0	0	0	0	0	1	0	0	1	1	0	1 (19 Oct)	1	1	19 Oct	19 Oct
	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	5	2	0	4	0	0	2	7	3	2	0	1	26	7	19	4 (22 Jan)	13	14	11 Jan	3 Dec
2.	Common Seal	0	0	1	1	1	0	0	0	0	0	0	1	4	0	4	1 (22 Mar)	4	4	22 Mar	14 Dec
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
	Totals	1940	2489	23331	36665	23613	453	6221	8523	9739	14525	1787	4158	133444	47261	86183		100	110
	Observation hours	7:30	11:00	35:50	37:40	25:30	4:00	15:15	32:40	34:20	25:45	6:30	10:50	246:50

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Totals Castricum aan Zee (zeetrek) 2025