Select until 3 December

Totals Castricum aan Zee (zeetrek) 2015 - 2024

	Species	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	Totals	Average	Present	Year Maximum
1.	Dark-bellied Brent Goose	7301	4336	4620	5160	5710	6496	6195	1457	4421	3183	48879	4888	1	7301 (2015)
2.	Pale-bellied Brent Goose	0	1	2	0	0	13	2	0	0	7	25	2.5	0	13 (2020)
3.	Black Brant	0	1	0	0	0	1	0	0	0	0	2	0.2	0	1 (2016)
4.	Canada Goose	5	18	33	7	16	7	39	27	27	1	180	18	0	39 (2021)
5.	Barnacle Goose	264	424	1133	3858	3162	3097	2122	1107	781	1777	17725	1773	0	3858 (2018)
6.	Bar-headed Goose	0	0	0	0	2	0	0	0	0	0	2	0.2	0	2 (2019)
7.	Ross's Goose	0	0	0	0	0	2	0	0	0	0	2	0.2	0	2 (2020)
8.	Snow Goose	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2018)
9.	Greylag Goose	133	118	231	161	137	284	220	335	120	241	1980	198	25	335 (2022)
10.	Anser sp.	4	10	0	0	0	0	70	0	2	0	86	8.6	0	70 (2021)
11.	goose sp.	33	0	520	98	450	119	137	540	17	27	1941	194	0	540 (2022)
12.	Domestic Goose	0	0	7	0	1	2	0	1	2	0	13	1.3	0	7 (2017)
13.	Pink-footed Goose	0	220	4	74	51	585	5	112	0	1042	2093	209	0	1042 (2024)
14.	Tundra Bean Goose	12	43	0	12	1	51	0	210	0	0	329	33	0	210 (2022)
15.	Bean Goose sp.	0	0	0	0	4	0	0	0	0	0	4	0.4	0	4 (2019)
16.	Eurasian White-fronted Goose	32	5	42	89	8	146	889	111	53	0	1375	138	1	889 (2021)
17.	Black Swan	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2022)
18.	Mute Swan	11	28	20	26	12	26	17	4	4	9	157	16	0	28 (2016)
19.	Bewick's Swan	0	2	0	0	0	0	0	1	0	0	3	0.3	0	2 (2016)
20.	Whooper Swan	0	3	0	0	0	0	0	0	0	0	3	0.3	0	3 (2016)
21.	swan sp.	0	28	3	0	0	0	0	0	0	0	31	3.1	0	28 (2016)
22.	Egyptian Goose	24	19	95	49	108	145	109	128	86	49	812	81	0	145 (2020)
23.	Shelduck	319	670	1190	1701	1014	1138	1964	1173	1361	901	11431	1143	6	1964 (2021)
24.	Ruddy Shelduck	0	3	0	0	0	0	0	0	13	0	16	1.6	0	13 (2023)
25.	Garganey	10	7	30	17	16	29	35	119	2	2	267	27	0	119 (2022)
26.	Shoveler	164	260	1077	564	1064	2531	459	1202	156	280	7757	776	20	2531 (2020)
27.	Gadwall	68	39	152	94	143	124	123	70	56	56	925	93	9	152 (2017)
28.	Wigeon	743	1782	5144	2988	2127	4370	4643	1789	2937	1199	27722	2772	426	5144 (2017)
29.	Mallard	20	13	34	72	26	18	24	25	16	10	258	26	1	72 (2018)
30.	Pintail	52	167	855	238	129	185	324	494	104	149	2697	270	0	855 (2017)
31.	Teal	911	896	3139	1988	1931	1747	2294	2135	1020	873	16934	1693	59	3139 (2017)
32.	duck sp.	0	5	7	42	7	263	78	5	1	4	412	41	3	263 (2020)
33.	Red-crested Pochard	0	0	1	0	4	0	0	0	0	0	5	0.5	0	4 (2019)
34.	Pochard	7	33	20	18	13	122	25	31	7	20	296	30	0	122 (2020)
35.	Tufted Duck	221	48	66	137	80	103	169	103	49	31	1007	101	0	221 (2015)
36.	Scaup	26	34	77	38	16	401	77	53	19	28	769	77	0	401 (2020)
37.	Aythya sp.	0	0	0	20	0	0	5	0	0	0	25	2.5	0	20 (2018)
38.	King Eider	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2024)
39.	Eider	290	629	593	415	438	853	797	507	429	320	5271	527	37	853 (2020)
40.	Velvet Scoter	69	373	221	83	121	268	418	258	316	1186	3313	331	19	1186 (2024)
41.	Common Scoter	10642	29100	24735	16642	10858	64026	49809	18531	21650	59952	305945	30595	15300	64026 (2020)
42.	Long-tailed Duck	2	12	11	7	5	0	8	6	1	3	55	5.5	1	12 (2016)
43.	Goldeneye	12	30	23	19	3	35	38	53	9	9	231	23	0	53 (2022)
44.	Smew	0	4	0	2	0	0	13	1	1	0	21	2.1	0	13 (2021)
45.	Goosander	4	4	4	10	8	11	16	14	10	2	83	8.3	0	16 (2021)
46.	Red-breasted Merganser	475	380	428	439	553	588	619	678	211	130	4501	450	6	678 (2022)
47.	Swift	24	5	68	0	13	2	0	2	4	7	125	13	0	68 (2017)
48.	Feral Pigeon	55	14	43	22	9	8	1	3	0	0	155	16	0	55 (2015)
49.	Stock Dove	0	0	0	0	2	0	0	0	0	1	3	0.3	0	2 (2019)
50.	Woodpigeon	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
	Species	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	Totals	Average	Present	Year Maximum
51.	Red-necked Grebe	9	4	4	6	6	5	7	13	3	3	60	6	3	13 (2022)
52.	Great Crested Grebe	1061	864	465	1324	571	344	927	1764	377	327	8024	802	2001	1764 (2022)
53.	Slavonian Grebe	0	1	2	5	0	1	0	0	1	1	11	1.1	3	5 (2018)
54.	Black-necked Grebe	0	0	1	2	0	1	1	0	0	1	6	0.6	0	2 (2018)
55.	Black-necked / Slavonian Grebe	2	1	0	0	0	0	1	2	0	0	6	0.6	0	2 (2015)
56.	Oystercatcher	233	568	453	614	542	580	626	315	492	239	4662	466	15	626 (2021)
57.	Avocet	63	77	73	146	98	63	165	336	17	79	1117	112	0	336 (2022)
58.	Grey Plover	98	646	418	222	603	803	606	683	392	323	4794	479	0	803 (2020)
59.	Golden Plover	54	2	87	16	27	8	35	29	24	1	283	28	0	87 (2017)
60.	Ringed Plover	60	377	237	185	133	122	48	70	316	158	1706	171	5	377 (2016)
61.	Little Ringed Plover	3	1	1	1	0	2	1	2	0	2	13	1.3	0	3 (2015)
62.	Lapwing	0	5	3	224	30	1	205	874	0	0	1342	134	0	874 (2022)
63.	Kentish Plover	0	2	1	0	1	0	1	0	2	1	8	0.8	0	2 (2016)
64.	Whimbrel	114	309	400	98	430	891	708	256	109	108	3423	342	0	891 (2020)
65.	Curlew	195	167	120	196	231	158	347	251	81	60	1806	181	0	347 (2021)
66.	Bar-tailed Godwit	1408	494	2110	137	558	4538	4212	6263	80	4479	24279	2428	14	6263 (2022)
67.	Black-tailed Godwit	2	0	1	18	5	1	1	1	0	0	29	2.9	0	18 (2018)
68.	Woodcock	0	0	1	1	0	1	3	0	0	0	6	0.6	0	3 (2021)
69.	Snipe	7	15	5	21	8	18	3	33	9	3	122	12	0	33 (2022)
70.	Grey Phalarope	4	2	1	1	0	1	0	1	5	1	16	1.6	1	5 (2023)
71.	Common Sandpiper	2	3	0	5	3	3	5	1	5	1	28	2.8	0	5 (2018)
72.	Green Sandpiper	0	0	4	2	4	2	0	4	0	1	17	1.7	0	4 (2017)
73.	Wood Sandpiper	0	3	1	0	0	0	2	1	1	0	8	0.8	0	3 (2016)
74.	Redshank	19	67	62	111	117	342	94	147	63	108	1130	113	0	342 (2020)
75.	Spotted Redshank	0	3	1	0	12	1	3	16	0	1	37	3.7	0	16 (2022)
76.	Greenshank	3	9	15	9	23	8	18	16	1	5	107	11	0	23 (2019)
77.	Turnstone	34	108	36	21	66	69	84	77	111	17	623	62	1	111 (2023)
78.	Knot	234	966	360	527	391	2351	686	1295	208	333	7351	735	0	2351 (2020)
79.	Ruff	2	21	33	50	126	26	0	41	6	4	309	31	0	126 (2019)
80.	wader sp.	35	547	635	29	396	115	220	33	10	26	2046	205	0	635 (2017)
81.	large wader	0	0	0	0	0	0	56	868	0	0	924	92	0	868 (2022)
82.	Curlew Sandpiper	0	4	17	6	5	8	8	3	2	3	56	5.6	0	17 (2017)
83.	Temminck's Stint	0	1	0	1	0	0	0	0	0	0	2	0.2	0	1 (2016)
84.	Sanderling	1035	3259	2741	1172	1544	4437	1893	900	1827	980	19788	1979	584	4437 (2020)
85.	Dunlin	2679	3443	2132	1654	2275	2684	4391	6191	4814	763	31026	3103	8	6191 (2022)
86.	Purple Sandpiper	3	1	5	0	0	5	1	0	4	5	24	2.4	0	5 (2017)
87.	Little Stint	0	9	8	2	2	4	1	4	11	2	43	4.3	0	11 (2023)
88.	Calidris sp.	32	791	624	115	38	215	163	99	51	84	2212	221	0	791 (2016)
89.	Little Tern	152	218	184	107	298	486	461	342	56	84	2388	239	0	486 (2020)
90.	Gull-billed Tern	0	0	0	2	0	1	1	0	0	0	4	0.4	0	2 (2018)
91.	Caspian Tern	0	3	2	0	1	3	2	0	5	0	16	1.6	0	5 (2023)
92.	Whiskered Tern	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2024)
93.	Black Tern	50	112	321	99	353	857	2408	260	495	258	5213	521	8	2408 (2021)
94.	White-winged Black Tern	0	0	0	0	0	0	7	0	1	1	9	0.9	0	7 (2021)
95.	Arctic Tern	83	958	199	248	138	166	279	487	55	237	2850	285	34	958 (2016)
96.	Common/Arctic Tern	1635	2170	5272	2153	7508	15598	34566	8455	12991	12406	102754	10275	234	34566 (2021)
97.	Common Tern	2564	4894	3100	2627	4106	6094	5956	4866	6827	2170	43204	4320	460	6827 (2023)
98.	Roseate Tern	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2020)
99.	sterna sp.	0	0	0	0	0	0	0	0	0	6	6	0.6	0	6 (2024)
100.	Sandwich Tern	2042	7654	11840	13461	10855	14618	27851	6282	7088	4580	106271	10627	351	27851 (2021)
	Species	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	Totals	Average	Present	Year Maximum
101.	Little Gull	6128	3653	16727	989	13790	10427	41392	6242	6719	864	106931	10693	3549	41392 (2021)
102.	Kittiwake	5213	2516	4237	2404	888	7369	2058	2162	4525	998	32370	3237	2100	7369 (2020)
103.	Sabine's Gull	0	0	3	1	0	1	0	0	3	2	10	1	0	3 (2017)
104.	Black-headed Gull	3269	12244	13158	6197	19710	17222	25755	22676	6915	10480	137626	13763	1211	25755 (2021)
105.	Laughing Gull	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2019)
106.	Mediterranean Gull	8	23	44	35	98	65	234	44	44	43	638	64	5	234 (2021)
107.	Common Gull	7232	8612	8865	5304	11267	16592	17354	14818	11876	5132	107052	10705	3120	17354 (2021)
108.	Caspian Gull	3	8	3	6	4	4	9	13	17	4	71	7.1	3	17 (2023)
109.	Herring Gull	0	0	1	0	0	0	0	0	1	0	2	0.2	0	1 (2017)
110.	L. argentatus x L. hyperboreus	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2021)
111.	Yellow-legged Gull	1	2	3	2	1	2	6	5	2	0	24	2.4	2	6 (2021)
112.	Great Black-backed Gull	1490	212	437	5	4	16	32	51	26	37	2310	231	46	1490 (2015)
113.	Glaucous Gull	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2023)
114.	Lesser Black-backed Gull	60	56	164	26	39	71	242	63	26	8	755	76	29	242 (2021)
115.	Laridae sp.	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2023)
116.	Iceland Gull	1	2	2	0	2	0	1	0	0	1	9	0.9	0	2 (2016)
117.	Long-tailed Skua	0	1	3	0	0	5	3	5	8	3	28	2.8	3	8 (2023)
118.	skua sp.	12	3	22	16	15	13	31	12	19	4	147	15	2	31 (2021)
119.	Arctic Skua	51	31	78	52	61	47	400	89	213	22	1044	104	6	400 (2021)
120.	S. parasiticus / pomarinus	0	1	0	0	3	0	1	0	5	0	10	1	0	5 (2023)
121.	Pomarine Skua	21	8	16	13	39	12	10	5	5	0	129	13	1	39 (2019)
122.	Great Skua	14	12	48	28	15	17	33	0	10	1	178	18	4	48 (2017)
123.	Puffin	0	3	1	0	1	3	2	3	2	0	15	1.5	0	3 (2016)
124.	Black Guillemot	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2019)
125.	Razorbill	12	29	28	34	21	42	19	51	183	11	430	43	22	183 (2023)
126.	Razorbill/Guillemot	5075	4545	2009	3963	2072	7701	3694	3877	3422	1179	37537	3754	271	7701 (2020)
127.	Little Auk	2	8	2	0	0	3	3	12	0	4	34	3.4	2	12 (2022)
128.	Guillemot	84	634	232	45	205	120	237	109	106	78	1850	185	87	634 (2016)
129.	Red-throated Diver	633	3420	410	901	519	542	974	2785	1590	470	12244	1224	524	3420 (2016)
130.	Black-throated Diver	9	18	27	7	9	26	52	19	7	14	188	19	0	52 (2021)
131.	Great Northern Diver	1	2	2	0	1	1	1	2	3	2	15	1.5	1	3 (2023)
132.	diver sp.	886	1317	3041	3156	1736	5440	7275	3449	2665	1820	30785	3079	773	7275 (2021)
133.	Great Northern/Yellow-billed Diver	0	0	0	1	0	0	1	0	0	0	2	0.2	0	1 (2018)
134.	Storm Petrel	0	0	2	0	0	0	0	0	0	0	2	0.2	0	2 (2017)
135.	storm-petrel sp.	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
136.	Leach's Petrel	18	1	5	27	0	4	5	2	4	1	67	6.7	0	27 (2018)
137.	Fulmar	95	3	11	6	4	8	56	6	2	21	212	21	0	95 (2015)
138.	Sooty Shearwater	23	60	9	9	1	10	25	75	35	9	256	26	0	75 (2022)
139.	Manx Shearwater	26	6	5	17	3	0	1	3	6	1	68	6.8	0	26 (2015)
140.	Balearic Shearwater	0	2	0	0	0	0	0	4	1	0	7	0.7	0	4 (2022)
141.	Gannet	1978	1489	939	1759	516	1280	2005	987	4399	1459	16811	1681	284	4399 (2023)
142.	Cormorant	88	203	450	226	0	527	10346	1111	346	1603	14900	1490	22	10346 (2021)
143.	Spoonbill	0	100	88	2	21	52	327	5	138	46	779	78	0	327 (2021)
144.	Little Egret	0	0	2	2	0	1	0	0	1	0	6	0.6	0	2 (2017)
145.	Great White Egret	0	4	1	2	2	7	4	19	2	9	50	5	0	19 (2022)
146.	Grey Heron	2	26	6	11	27	27	12	11	21	11	154	15	0	27 (2019)
147.	Purple Heron	0	0	0	0	0	2	0	0	0	0	2	0.2	0	2 (2020)
148.	Osprey	2	0	2	0	1	1	0	3	0	0	9	0.9	0	3 (2022)
149.	Sparrowhawk	1	2	2	1	0	3	2	0	1	2	14	1.4	0	3 (2020)
150.	Marsh Harrier	0	0	0	2	5	2	2	0	1	0	12	1.2	0	5 (2019)
	Species	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	Totals	Average	Present	Year Maximum
151.	Hen Harrier	0	0	1	1	1	1	1	2	0	1	8	0.8	0	2 (2022)
152.	White-tailed Eagle	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2022)
153.	Rough-legged Buzzard	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2024)
154.	Common Buzzard	1	0	1	0	0	0	0	0	0	0	2	0.2	0	1 (2015)
155.	Short-eared Owl	0	1	1	0	1	0	0	0	0	0	3	0.3	0	1 (2016)
156.	Kestrel	1	0	7	3	0	3	0	0	2	0	16	1.6	0	7 (2017)
157.	Merlin	3	1	5	4	6	3	0	2	0	0	24	2.4	0	6 (2019)
158.	Hobby	0	0	1	0	1	1	0	0	0	0	3	0.3	0	1 (2017)
159.	Peregrine	2	7	4	4	4	4	3	1	5	2	36	3.6	0	7 (2016)
160.	Rose-ringed Parakeet	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
161.	Jackdaw	0	0	6	0	0	3	0	0	0	0	9	0.9	0	6 (2017)
162.	Rook	1	4	2	1	1	0	3	3	2	0	17	1.7	0	4 (2016)
163.	Carrion Crow	0	2	0	0	0	0	0	0	0	0	2	0.2	0	2 (2016)
164.	Blue Tit	0	1	3	0	0	0	0	0	0	0	4	0.4	0	3 (2017)
165.	Skylark	4	14	695	0	21	0	13	3	71	2	823	82	0	695 (2017)
166.	Shore Lark	0	0	4	0	0	0	0	8	10	0	22	2.2	0	10 (2023)
167.	Sand Martin	0	12	7	3	15	1	0	0	0	0	38	3.8	0	15 (2019)
168.	Swallow	31	116	41	2	15	20	0	7	2	4	238	24	0	116 (2016)
169.	House Martin	1	0	0	0	4	0	0	0	0	2	7	0.7	0	4 (2019)
170.	Zitting Cisticola	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2023)
171.	Starling	600	386	168	0	4	73	468	349	3811	41	5900	590	0	3811 (2023)
172.	Mistle Thrush	4	0	0	0	0	0	0	0	0	0	4	0.4	0	4 (2015)
173.	Redwing	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
174.	Fieldfare	0	0	0	710	0	0	0	0	0	0	710	71	0	710 (2018)
175.	House Sparrow	0	0	0	0	0	0	0	2	0	0	2	0.2	0	2 (2022)
176.	Blue-headed Wagtail	5	2	0	0	3	0	5	0	0	1	16	1.6	0	5 (2015)
177.	Yellow Wagtail (flavissima)	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2020)
178.	Grey-headed Wagtail	0	0	0	1	0	1	0	0	0	2	4	0.4	0	2 (2024)
179.	Yellow wagtail sp.	11	1	9	2	0	0	1	0	0	0	24	2.4	0	11 (2015)
180.	Grey Wagtail	3	10	4	5	0	1	1	0	12	0	36	3.6	0	12 (2023)
181.	White Wagtail	34	35	0	2	25	1	10	3	0	5	115	12	1	35 (2016)
182.	alba wagtail sp.	7	24	53	18	7	9	16	2	1	1	138	14	0	53 (2017)
183.	Pied Wagtail	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
184.	Meadow Pipit	0	8	2	0	0	1	0	0	2	0	13	1.3	0	8 (2016)
185.	Tree Pipit	0	1	1	2	0	0	1	0	0	0	5	0.5	0	2 (2018)
186.	Red-throated Pipit	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
187.	Rock Pipit	0	10	3	1	2	1	4	1	0	1	23	2.3	0	10 (2016)
188.	Rock Pipit/Water Pipit	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
189.	Chaffinch	0	0	0	0	0	0	0	0	10	0	10	1	0	10 (2023)
190.	Brambling	0	0	1	0	1	0	0	0	0	0	2	0.2	0	1 (2017)
191.	Common Rosefinch	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2018)
192.	Greenfinch	0	2	0	0	0	0	0	0	0	0	2	0.2	0	2 (2016)
193.	Twite	0	0	0	2	0	0	0	0	0	0	2	0.2	0	2 (2018)
194.	Linnet	0	6	3	0	0	1	0	0	0	0	10	1	0	6 (2016)
195.	Mealy Redpoll	0	0	4	81	0	0	0	0	0	0	85	8.5	0	81 (2018)
196.	redpoll sp.	0	0	2	0	0	0	0	0	0	0	2	0.2	0	2 (2017)
197.	Serin	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2019)
198.	Siskin	0	0	2	0	0	1	0	0	0	0	3	0.3	0	2 (2017)
199.	Lapland Bunting	0	1	0	0	1	1	0	0	0	0	3	0.3	0	1 (2016)
200.	Snow Bunting	9	12	7	4	4	1	6	10	5	1	59	5.9	1	12 (2016)
	Species	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	Totals	Average	Present	Year Maximum
201.	Reed Bunting	0	1	8	0	0	0	0	0	0	0	9	0.9	1	8 (2017)
	Other species
1.	Harbour Porpoise	71	177	82	78	44	83	227	57	52	53	924	92	22	227 (2021)
2.	Long-Finned Pilot Whale	10	0	0	0	0	0	0	0	0	0	10	1	0	10 (2015)
3.	Humpback whale	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2024)
4.	whale sp.	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
5.	Grey seal	1	1	3	3	1	1	5	2	1	0	18	1.8	1	5 (2021)
6.	Common Seal	7	5	11	9	3	6	14	5	1	1	62	6.2	5	14 (2021)
7.	Common / Grey seal	1	0	0	0	2	3	0	0	1	0	7	0.7	0	3 (2020)
	Other species
1.	Small Tortoiseshell	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
2.	Brimstone	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2019)
3.	European Peacock	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2019)
4.	white sp. (butterfly)	23	69	3	7	11	9	1	1	0	0	124	12	0	69 (2016)
5.	Red Admiral	16	8	0	0	5	0	0	0	0	0	29	2.9	0	16 (2015)
6.	Painted Lady	0	0	0	0	2	0	0	0	0	0	2	0.2	0	2 (2019)
	Species	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	Totals	Average	Present	Year Maximum
	Totals	69134	108722	128835	86902	111015	211323	272181	131744	117765	123820	1361441	136144	31734
	Observation hours	203:50	255:10	279:45	208:14	246:10	300:06	324:30	220:06	226:59	157:00	2,421:50	242:11

Trektellen

Totals Castricum aan Zee (zeetrek) 2015 - 2024