Totals Castricum aan Zee (zeetrek) 2025

Year
Period
count-field
Also present

	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	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	3898	318	3580	825 (21 May)	38	39	2 Jan	16 Nov
2.	Pale-bellied Brent Goose	0	0	0	1	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	43	19	24	13 (30 Apr)	11	11	26 Feb	5 May
4.	Barnacle Goose	187	103	3491	1465	865	0	0	0	0	0	4	6115	578	5537	1475 ( 8 Mar)	25	25	22 Jan	16 Nov
5.	Greylag Goose	3	57	254	201	116	0	0	13	0	0	0	644	196	448	91 ( 9 Mar)	37	38	22 Jan	15 Aug
6.	goose sp.	0	0	0	0	0	0	0	0	0	2	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	397	36	361	263 (26 Feb)	3	3	22 Jan	26 Feb
8.	Eurasian White-fronted Goose	5	46	0	0	0	0	0	0	0	0	0	51	1	50	46 (26 Feb)	3	3	22 Jan	26 Feb
9.	Mute Swan	0	0	0	0	21	0	0	0	1	0	0	22	13	9	7 ( 5 May)	5	5	5 May	13 Sep
10.	Egyptian Goose	2	14	70	94	25	2	0	6	0	0	0	213	55	158	28 (21 Mar)	29	30	22 Jan	23 Aug
11.	Shelduck	7	10	129	145	322	5	157	408	313	152	0	1648	503	1145	172 (21 May)	69	70	2 Jan	29 Oct
12.	Garganey	0	0	13	5	0	0	0	1	0	0	0	19	2	17	8 (21 Mar)	6	6	21 Mar	23 Aug
13.	Shoveler	0	2	724	1083	6	0	0	8	13	0	1	1837	116	1721	357 ( 4 Apr)	31	32	18 Feb	16 Nov
14.	Gadwall	0	14	28	32	6	0	0	7	20	7	0	114	30	84	16 ( 6 Apr)	29	30	15 Feb	22 Oct
15.	Wigeon	355	386	1591	72	2	0	0	5	39	14	22	2486	435	2051	913 (29 Mar)	39	40	2 Jan	16 Nov
16.	Mallard	0	0	3	1	0	0	1	1	2	0	1	9	3	6	2 (20 Mar)	7	7	8 Mar	16 Nov
17.	Pintail	1	11	120	30	2	0	0	1	11	1	0	177	15	162	39 ( 8 Mar)	21	21	22 Jan	19 Oct
18.	Teal	21	52	2314	939	22	0	13	47	51	58	9	3526	212	3314	683 ( 8 Mar)	59	60	2 Jan	16 Nov
19.	duck sp.	0	0	10	0	0	0	0	1	6	0	12	29	18	11	12 (16 Nov)	5	5	8 Mar	16 Nov
20.	Pochard	0	0	0	5	1	0	0	1	0	0	1	8	1	7	3 ( 3 Apr)	5	5	3 Apr	22 Nov
21.	Tufted Duck	2	0	7	21	8	0	4	5	2	17	0	66	14	52	15 (30 Apr)	19	19	22 Jan	19 Oct
22.	Scaup	0	2	11	0	0	0	0	1	4	1	0	19	3	16	6 ( 9 Mar)	7	7	18 Feb	24 Oct
23.	Aythya sp.	1	0	0	0	0	0	0	0	0	0	0	1	0	1	1 (26 Jan)	1	1	26 Jan	26 Jan
24.	Eider	14	52	369	197	87	7	3	4	91	14	14	852	357	495	90 (26 Mar)	67	68	2 Jan	16 Nov
25.	Velvet Scoter	28	0	13	3	0	0	0	1	0	3	2	50	29	21	27 ( 2 Jan)	10	10	2 Jan	16 Nov
26.	Common Scoter	393	351	4638	2875	2508	30	220	395	332	375	300	12417	3489	8928	1348 (29 Mar)	100	102	2 Jan	22 Nov
27.	Goldeneye	0	0	5	0	0	0	0	0	0	0	4	9	3	6	4 (16 Nov)	3	3	9 Mar	16 Nov
28.	Smew	3	0	0	0	0	0	0	0	0	0	0	3	3	0	2 (22 Jan)	2	2	11 Jan	22 Jan
29.	Goosander	0	0	6	0	0	0	0	4	0	0	0	10	4	6	4 (20 Mar)	3	3	9 Mar	17 Aug
30.	Red-breasted Merganser	0	6	222	218	10	0	0	0	0	23	8	487	43	444	58 ( 8 Apr)	40	41	6 Feb	16 Nov
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
31.	Swift	0	0	0	1	6	0	0	1	0	0	0	8	2	6	6 (13 May)	3	3	26 Apr	31 Aug
32.	Red-necked Grebe	1	1	0	0	0	0	0	1	0	0	1	4	2	2	1 (22 Jan)	4	4	22 Jan	9 Nov
33.	Great Crested Grebe	212	49	43	27	35	4	6	8	6	6	39	435	305	130	181 (22 Jan)	57	58	2 Jan	22 Nov
34.	Black-necked Grebe	0	0	0	0	0	0	0	1	0	0	0	1	0	1	1 (17 Aug)	1	1	17 Aug	17 Aug
35.	Black-necked / Slavonian Grebe	0	0	0	0	0	0	0	0	0	1	0	1	1	0	1 ( 6 Oct)	1	1	6 Oct	6 Oct
36.	Greater Flamingo	0	0	0	0	3	0	0	0	0	0	0	3	0	3	3 (21 May)	1	1	21 May	21 May
37.	Oystercatcher	0	20	114	346	341	2	14	79	14	3	7	940	273	667	89 (10 May)	68	69	15 Feb	9 Nov
38.	Avocet	0	0	389	31	28	0	9	0	0	0	0	457	3	454	173 (20 Mar)	19	19	8 Mar	23 Jul
39.	Grey Plover	0	0	47	189	825	0	0	15	21	12	0	1109	36	1073	405 ( 5 May)	36	37	11 Mar	29 Oct
40.	Golden Plover	0	0	0	1	3	0	0	2	21	0	0	27	23	4	18 (16 Sep)	6	6	27 Apr	17 Sep
41.	Dotterel	0	0	0	0	0	0	0	1	0	0	0	1	0	1	1 (17 Aug)	1	1	17 Aug	17 Aug
42.	Ringed Plover	0	1	5	11	314	0	0	40	22	1	0	394	43	351	191 (11 May)	26	27	18 Feb	4 Oct
43.	Little Ringed Plover	0	0	0	2	0	0	0	0	0	0	0	2	0	2	1 ( 4 Apr)	2	2	4 Apr	27 Apr
44.	Kentish Plover	0	0	0	2	0	0	0	0	0	0	0	2	0	2	2 ( 6 Apr)	1	1	6 Apr	6 Apr
45.	Whimbrel	0	0	0	226	108	0	14	22	5	0	0	375	41	334	69 ( 4 Apr)	32	33	3 Apr	16 Sep
46.	Curlew	0	4	40	44	3	0	8	10	6	2	0	117	25	92	33 (16 Apr)	32	33	15 Feb	29 Oct
47.	Bar-tailed Godwit	0	0	21	677	221	0	1	3	32	0	0	955	35	920	378 (21 Apr)	25	26	21 Mar	16 Sep
48.	Black-tailed Godwit	0	0	4	1	0	0	0	0	0	0	0	5	4	1	4 ( 8 Mar)	2	2	8 Mar	30 Apr
49.	Snipe	0	0	1	0	0	0	0	0	8	0	0	9	8	1	5 ( 5 Sep)	3	3	19 Mar	14 Sep
50.	Common Sandpiper	0	0	0	6	0	0	0	0	0	0	0	6	0	6	6 (30 Apr)	1	1	30 Apr	30 Apr
51.	Green Sandpiper	0	0	0	0	0	0	2	0	0	0	0	2	1	1	2 (19 Jul)	1	1	19 Jul	19 Jul
52.	Redshank	0	0	5	58	108	0	3	21	1	0	0	196	2	194	67 (11 May)	20	20	11 Mar	4 Sep
53.	Spotted Redshank	0	0	0	1	4	0	0	1	0	0	0	6	0	6	4 (11 May)	3	3	26 Apr	16 Aug
54.	Greenshank	0	0	0	46	2	0	1	1	0	0	0	50	2	48	19 (21 Apr)	8	8	19 Apr	31 Aug
55.	Turnstone	0	0	1	11	62	0	2	15	4	0	0	95	10	85	53 ( 5 May)	17	17	20 Mar	13 Sep
56.	Knot	0	0	4	152	2476	0	1	8	16	9	0	2666	30	2636	2006 ( 5 May)	25	25	15 Mar	29 Oct
57.	Ruff	0	0	1	25	0	0	0	0	0	0	0	26	0	26	19 ( 6 Apr)	4	4	9 Mar	30 Apr
58.	wader sp.	0	0	3	2	2	0	0	4	34	32	0	77	62	15	25 (22 Oct)	13	13	15 Mar	22 Oct
59.	small wader	0	0	0	2	0	0	4	0	0	0	0	6	4	2	4 (19 Jul)	2	2	19 Apr	19 Jul
60.	Curlew Sandpiper	0	0	0	0	4	0	0	0	0	0	0	4	0	4	3 ( 5 May)	2	2	5 May	11 May
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
61.	Temminck's Stint	0	0	0	0	1	0	0	0	0	0	0	1	0	1	1 (11 May)	1	1	11 May	11 May
62.	Sanderling	3	23	198	400	804	0	5	203	48	15	15	1714	72	1642	190 ( 5 May)	49	50	11 Jan	16 Nov
63.	Dunlin	0	182	2096	4739	143	0	9	43	81	36	2	7331	103	7228	2852 ( 4 Apr)	57	58	5 Feb	16 Nov
64.	Purple Sandpiper	0	0	0	2	0	0	0	0	0	0	0	2	0	2	1 ( 4 Apr)	2	2	4 Apr	8 Apr
65.	Little Stint	0	0	0	1	1	0	0	1	0	0	0	3	0	3	1 ( 4 Apr)	3	3	4 Apr	16 Aug
66.	Calidris sp.	0	3	0	20	79	0	0	43	19	10	1	175	46	129	32 (13 May)	14	14	5 Feb	16 Nov
67.	Little Tern	0	0	1	199	131	4	2	8	6	0	0	351	24	327	75 (26 Apr)	25	26	31 Mar	19 Sep
68.	Gull-billed Tern	0	0	0	0	2	0	0	0	0	0	0	2	0	2	2 (10 May)	1	1	10 May	10 May
69.	Caspian Tern	0	0	0	0	0	0	1	1	0	0	0	2	2	0	1 (19 Jul)	2	2	19 Jul	27 Aug
70.	Black Tern	0	0	0	83	194	0	4	40	21	0	0	342	52	290	54 ( 5 May)	30	31	8 Apr	17 Sep
71.	White-winged Black Tern	0	0	0	0	2	0	0	0	0	0	0	2	0	2	2 (10 May)	1	1	10 May	10 May
72.	Arctic Tern	0	0	0	23	72	14	0	0	0	2	0	111	2	109	28 ( 4 May)	9	9	19 Apr	29 Oct
73.	Common/Arctic Tern	0	0	0	2518	7220	88	1709	3066	3416	10	0	18027	8200	9827	2268 ( 3 May)	52	53	5 Apr	5 Oct
74.	Common Tern	0	0	0	1032	70	79	198	0	122	0	0	1501	667	834	877 (21 Apr)	16	16	2 Apr	16 Sep
75.	Sandwich Tern	0	0	91	4243	1213	202	384	2812	2129	60	3	11137	6065	5072	820 (30 Apr)	78	80	9 Mar	16 Nov
76.	Little Gull	0	5	313	6591	115	0	2	3	0	212	2	7243	238	7005	2835 (21 Apr)	44	45	5 Feb	22 Nov
77.	Kittiwake	0	16	4	0	0	0	2	1	0	142	1	166	120	46	94 (29 Oct)	12	12	5 Feb	22 Nov
78.	Black-headed Gull	102	99	1600	2334	2032	1	2940	484	76	378	41	10087	4038	6049	1232 (19 Jul)	89	91	2 Jan	22 Nov
79.	Mediterranean Gull	0	0	5	13	8	1	34	4	1	2	0	68	38	30	19 (19 Jul)	26	27	9 Mar	11 Oct
80.	Common Gull	49	266	2626	3950	1584	2	381	103	12	169	141	9283	998	8285	586 ( 2 Apr)	84	86	2 Jan	22 Nov
81.	Caspian Gull	0	0	4	0	0	0	0	0	0	5	0	9	6	3	3 ( 5 Oct)	6	6	9 Mar	29 Oct
82.	Herring Gull	0	0	0	0	6	0	0	0	0	0	0	6	0	6	6 ( 8 May)	1	1	8 May	8 May
83.	Yellow-legged Gull	0	0	1	2	0	0	2	0	0	0	0	5	2	3	1 (23 Mar)	5	5	23 Mar	18 Jul
84.	Great Black-backed Gull	1	0	0	0	0	0	0	50	3	0	0	54	54	0	48 (18 Aug)	4	4	31 Jan	1 Sep
85.	Lesser Black-backed Gull	1	6	0	0	0	0	0	316	0	0	0	323	317	6	316 (15 Aug)	4	4	11 Jan	15 Aug
86.	Long-tailed Skua	0	0	0	0	0	0	0	0	3	0	0	3	3	0	2 (17 Sep)	2	2	16 Sep	17 Sep
87.	skua sp.	0	0	0	0	0	0	0	1	10	4	0	15	12	3	3 (16 Sep)	9	9	27 Aug	19 Oct
88.	Arctic Skua	0	0	0	0	2	1	0	12	36	23	0	74	48	26	16 ( 4 Oct)	20	20	11 May	24 Oct
89.	Pomarine Skua	0	0	0	0	0	0	0	0	1	6	0	7	4	3	3 ( 4 Oct)	5	5	16 Sep	24 Oct
90.	Great Skua	0	0	0	0	0	0	0	0	5	2	0	7	4	3	2 (12 Sep)	5	5	12 Sep	22 Oct
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
91.	Razorbill	0	0	0	0	0	0	0	0	0	3	0	3	1	2	2 (26 Oct)	2	2	4 Oct	26 Oct
92.	Razorbill/Guillemot	0	1	1	1	1	0	0	4	18	141	12	179	51	128	86 (19 Oct)	22	22	5 Feb	16 Nov
93.	alca / fratercula spec	0	0	0	0	0	0	0	0	0	1	0	1	0	1	1 (24 Oct)	1	1	24 Oct	24 Oct
94.	Little Auk	0	0	0	0	0	0	0	0	0	1	0	1	0	1	1 (29 Oct)	1	1	29 Oct	29 Oct
95.	Guillemot	0	0	0	0	0	0	0	0	8	0	0	8	7	1	4 (13 Sep)	3	3	5 Sep	17 Sep
96.	Red-throated Diver	175	51	80	35	5	0	0	2	4	21	4	377	210	167	131 (22 Jan)	46	47	22 Jan	9 Nov
97.	Black-throated Diver	1	0	3	0	1	0	0	0	0	0	0	5	0	5	2 (26 Mar)	4	4	31 Jan	4 May
98.	diver sp.	187	194	176	63	2	0	0	0	4	52	197	875	424	451	172 (16 Nov)	44	45	2 Jan	22 Nov
99.	Leach's Petrel	0	0	0	0	0	0	0	0	1	1	0	2	2	0	1 (21 Sep)	2	2	21 Sep	4 Oct
100.	Fulmar	0	0	0	0	0	0	0	1	4	0	0	5	4	1	3 (16 Sep)	3	3	27 Aug	16 Sep
101.	Sooty Shearwater	0	0	0	0	0	0	0	0	28	19	0	47	40	7	13 ( 4 Oct)	6	6	12 Sep	24 Oct
102.	Manx Shearwater	0	0	0	0	0	0	0	0	31	1	0	32	28	4	24 (16 Sep)	6	6	14 Sep	4 Oct
103.	Gannet	29	14	240	31	35	11	76	168	583	942	174	2303	1515	788	285 ( 4 Oct)	81	83	2 Jan	22 Nov
104.	Cormorant	0	51	0	0	0	0	0	0	1953	7318	0	9322	8307	1015	3236 ( 6 Oct)	9	9	18 Feb	29 Oct
105.	Spoonbill	0	0	0	7	3	0	0	0	34	0	0	44	36	8	34 (19 Sep)	4	4	27 Apr	19 Sep
106.	Little Egret	0	0	0	0	1	0	1	0	0	0	0	2	1	1	1 (10 May)	2	2	10 May	26 Jul
107.	Great White Egret	0	0	0	0	4	0	0	0	0	0	0	4	0	4	3 (10 May)	2	2	3 May	10 May
108.	Grey Heron	0	0	5	4	5	0	6	2	1	0	0	23	7	16	4 (21 Mar)	11	11	19 Mar	5 Sep
109.	Osprey	0	0	0	0	1	0	0	0	1	0	0	2	1	1	1 ( 1 May)	2	2	1 May	14 Sep
110.	Kestrel	0	0	0	2	0	0	0	0	2	0	0	4	2	2	2 ( 4 Apr)	2	2	4 Apr	5 Sep
111.	Merlin	0	0	0	3	0	0	0	0	0	0	0	3	0	3	2 ( 4 Apr)	2	2	4 Apr	8 Apr
112.	Rook	0	0	1	1	0	0	0	0	0	0	0	2	1	1	1 ( 8 Mar)	2	2	8 Mar	4 Apr
113.	Carrion Crow	0	0	0	1	0	0	0	0	0	0	0	1	1	0	1 (27 Apr)	1	1	27 Apr	27 Apr
114.	Skylark	0	0	4	0	0	0	0	0	0	3	0	7	3	4	3 (23 Mar)	3	3	20 Mar	29 Oct
115.	Shore Lark	0	0	0	0	0	0	0	0	0	2	0	2	2	0	2 (29 Oct)	1	1	29 Oct	29 Oct
116.	Sand Martin	0	0	0	15	3	0	0	0	0	0	0	18	0	18	14 ( 4 Apr)	4	4	4 Apr	10 May
117.	Swallow	0	0	0	5	34	0	0	0	0	0	0	39	1	38	16 (11 May)	5	5	27 Apr	13 May
118.	House Martin	0	0	0	0	1	0	0	0	0	0	0	1	0	1	1 ( 5 May)	1	1	5 May	5 May
119.	Starling	0	0	0	0	0	0	0	0	0	4000	506	4506	4506	0	4000 (29 Oct)	2	2	29 Oct	22 Nov
120.	Blue-headed Wagtail	0	0	0	0	0	0	0	6	0	0	0	6	6	0	6 (21 Aug)	1	1	21 Aug	21 Aug
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
121.	Yellow Wagtail (flavissima)	0	0	0	0	1	0	0	0	0	0	0	1	0	1	1 (11 May)	1	1	11 May	11 May
122.	Yellow wagtail sp.	0	0	0	0	5	0	0	0	0	0	0	5	0	5	5 (11 May)	1	1	11 May	11 May
123.	Grey Wagtail	0	0	0	0	0	0	0	0	0	11	1	12	10	2	6 (11 Oct)	4	4	11 Oct	9 Nov
124.	alba wagtail sp.	0	0	5	0	6	0	0	0	0	1	0	12	1	11	6 (13 May)	3	3	20 Mar	29 Oct
125.	Pied Wagtail	0	0	2	0	0	0	0	0	0	0	0	2	1	1	1 (19 Mar)	2	2	19 Mar	23 Mar
126.	Meadow Pipit	0	0	0	0	0	0	0	0	0	3	0	3	3	0	3 (29 Oct)	1	1	29 Oct	29 Oct
127.	Water Pipit	0	0	0	0	0	0	0	0	0	2	0	2	1	1	2 (19 Oct)	1	1	19 Oct	19 Oct
128.	Rock Pipit	0	0	2	3	0	0	0	0	0	0	0	5	0	5	3 ( 5 Apr)	3	3	1 Mar	5 Apr
129.	Lesser Redpoll	0	0	0	1	0	0	0	0	0	0	0	1	0	1	1 (27 Apr)	1	1	27 Apr	27 Apr
130.	Siskin	0	0	0	0	1	0	0	0	0	0	0	1	0	1	1 (10 May)	1	1	10 May	10 May
131.	Snow Bunting	1	0	1	0	0	0	0	0	0	0	2	4	2	2	2 (16 Nov)	3	3	11 Jan	16 Nov
132.	Yellowhammer	0	0	0	0	0	0	0	0	0	1	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	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
1.	Harbour Porpoise	5	2	0	4	0	0	2	7	3	2	0	25	7	18	4 (22 Jan)	13	13	11 Jan	29 Oct
2.	Common Seal	0	0	1	1	1	0	0	0	0	0	0	3	0	3	1 (22 Mar)	3	3	22 Mar	3 May
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
	Totals	1940	2489	23331	36665	23613	453	6221	8523	9739	14525	1585	129084	43705	85379		100	102
	Observation hours	7:30	11:00	35:50	37:40	25:30	4:00	15:15	32:40	34:20	25:45	4:30	234:00

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Totals Castricum aan Zee (zeetrek) 2025