Select until 23 November

Totals Castricum aan Zee (zeetrek) 2016 - 2025

	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
1.	Dark-bellied Brent Goose	4336	4620	5160	5710	6496	6195	1457	4421	3209	3898	45502	4550	1	6496 (2020)
2.	Pale-bellied Brent Goose	1	2	0	0	13	2	0	0	7	1	26	2.6	0	13 (2020)
3.	Black Brant	1	0	0	0	1	0	0	0	0	0	2	0.2	0	1 (2016)
4.	Canada Goose	18	33	7	16	7	39	27	27	1	43	218	22	0	43 (2025)
5.	Barnacle Goose	424	1133	3858	3162	3097	2122	1107	781	1786	6115	23585	2359	0	6115 (2025)
6.	Bar-headed Goose	0	0	0	2	0	0	0	0	0	0	2	0.2	0	2 (2019)
7.	Ross's Goose	0	0	0	0	2	0	0	0	0	0	2	0.2	0	2 (2020)
8.	Snow Goose	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
9.	Greylag Goose	118	231	161	137	284	220	335	120	251	644	2501	250	24	644 (2025)
10.	Anser sp.	10	0	0	0	0	70	0	2	0	0	82	8.2	0	70 (2021)
11.	goose sp.	0	520	98	450	119	137	540	17	27	2	1910	191	0	540 (2022)
12.	Domestic Goose	0	7	0	1	2	0	1	2	0	0	13	1.3	0	7 (2017)
13.	Pink-footed Goose	220	4	74	51	585	5	112	0	1042	397	2490	249	0	1042 (2024)
14.	Tundra Bean Goose	43	0	12	1	51	0	210	0	5	0	322	32	0	210 (2022)
15.	Bean Goose sp.	0	0	0	4	0	0	0	0	0	0	4	0.4	0	4 (2019)
16.	Eurasian White-fronted Goose	5	42	89	8	146	889	111	53	0	51	1394	139	0	889 (2021)
17.	Black Swan	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
18.	Mute Swan	28	20	26	12	26	17	4	4	9	22	168	17	0	28 (2016)
19.	Bewick's Swan	2	0	0	0	0	0	1	0	0	0	3	0.3	0	2 (2016)
20.	Whooper Swan	3	0	0	0	0	0	0	0	0	0	3	0.3	0	3 (2016)
21.	swan sp.	28	3	0	0	0	0	0	0	0	0	31	3.1	0	28 (2016)
22.	Egyptian Goose	19	95	49	108	145	109	128	86	49	213	1001	100	0	213 (2025)
23.	Shelduck	670	1190	1701	1014	1138	1964	1173	1361	919	1648	12778	1278	6	1964 (2021)
24.	Ruddy Shelduck	3	0	0	0	0	0	0	13	0	0	16	1.6	0	13 (2023)
25.	Garganey	7	30	17	16	29	35	119	2	2	19	276	28	0	119 (2022)
26.	Shoveler	260	1077	564	1064	2531	459	1202	156	280	1837	9430	943	20	2531 (2020)
27.	Gadwall	39	152	94	143	124	123	70	56	56	114	971	97	9	152 (2017)
28.	Wigeon	1782	5144	2988	2127	4370	4643	1789	2937	1315	2486	29581	2958	586	5144 (2017)
29.	Mallard	13	34	72	26	18	24	25	16	10	9	247	25	1	72 (2018)
30.	Pintail	167	855	238	129	185	324	494	104	149	177	2822	282	0	855 (2017)
31.	Teal	896	3139	1988	1931	1747	2294	2135	1020	881	3526	19557	1956	55	3526 (2025)
32.	duck sp.	5	7	42	7	263	78	5	1	6	29	443	44	3	263 (2020)
33.	Red-crested Pochard	0	1	0	4	0	0	0	0	0	0	5	0.5	0	4 (2019)
34.	Pochard	33	20	18	13	122	25	31	7	20	8	297	30	0	122 (2020)
35.	Tufted Duck	48	66	137	80	103	169	103	49	33	66	854	85	0	169 (2021)
36.	Scaup	34	77	38	16	401	77	53	19	28	19	762	76	0	401 (2020)
37.	Aythya sp.	0	0	20	0	0	5	0	0	0	1	26	2.6	0	20 (2018)
38.	King Eider	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2024)
39.	Eider	629	593	415	438	853	797	507	429	340	852	5853	585	35	853 (2020)
40.	Velvet Scoter	373	221	83	121	268	418	258	316	1366	50	3474	347	19	1366 (2024)
41.	Common Scoter	29100	24735	16642	10858	64026	49809	18531	21650	64199	12417	311967	31197	15247	64199 (2024)
42.	Long-tailed Duck	12	11	7	5	0	8	6	1	3	0	53	5.3	1	12 (2016)
43.	Goldeneye	30	23	19	3	35	38	53	9	9	9	228	23	0	53 (2022)
44.	Smew	4	0	2	0	0	13	1	1	0	3	24	2.4	0	13 (2021)
45.	Goosander	4	4	10	8	11	16	14	10	3	10	90	9	0	16 (2021)
46.	Red-breasted Merganser	380	428	439	553	588	619	678	211	137	487	4520	452	6	678 (2022)
47.	Swift	5	68	0	13	2	0	2	4	7	8	109	11	0	68 (2017)
48.	Feral Pigeon	14	43	22	9	8	1	3	0	0	0	100	10	0	43 (2017)
49.	Stock Dove	0	0	0	2	0	0	0	0	1	0	3	0.3	0	2 (2019)
50.	Woodpigeon	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
51.	Red-necked Grebe	4	4	6	6	5	7	13	3	5	4	57	5.7	3	13 (2022)
52.	Great Crested Grebe	864	465	1324	571	344	927	1764	377	460	435	7531	753	2033	1764 (2022)
53.	Slavonian Grebe	1	2	5	0	1	0	0	1	1	0	11	1.1	3	5 (2018)
54.	Black-necked Grebe	0	1	2	0	1	1	0	0	1	1	7	0.7	1	2 (2018)
55.	Black-necked / Slavonian Grebe	1	0	0	0	0	1	2	0	0	1	5	0.5	0	2 (2022)
56.	Greater Flamingo	0	0	0	0	0	0	0	0	0	3	3	0.3	0	3 (2025)
57.	Oystercatcher	568	453	614	542	580	626	315	492	239	940	5369	537	13	940 (2025)
58.	Avocet	77	73	146	98	63	165	336	17	79	457	1511	151	0	457 (2025)
59.	Grey Plover	646	418	222	603	803	606	683	392	323	1109	5805	581	4	1109 (2025)
60.	Golden Plover	2	87	16	27	8	35	29	24	1	27	256	26	0	87 (2017)
61.	Dotterel	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2025)
62.	Ringed Plover	377	237	185	133	122	48	70	316	158	394	2040	204	5	394 (2025)
63.	Little Ringed Plover	1	1	1	0	2	1	2	0	2	2	12	1.2	0	2 (2020)
64.	Lapwing	5	3	224	30	1	205	874	0	0	0	1342	134	0	874 (2022)
65.	Kentish Plover	2	1	0	1	0	1	0	2	1	2	10	1	0	2 (2016)
66.	Whimbrel	309	400	98	430	891	708	256	109	108	375	3684	368	0	891 (2020)
67.	Curlew	167	120	196	231	158	347	251	81	60	117	1728	173	0	347 (2021)
68.	Bar-tailed Godwit	494	2110	137	558	4538	4212	6263	80	4479	955	23826	2383	13	6263 (2022)
69.	Black-tailed Godwit	0	1	18	5	1	1	1	0	0	5	32	3.2	0	18 (2018)
70.	Woodcock	0	1	1	0	1	3	0	0	0	0	6	0.6	0	3 (2021)
71.	Snipe	15	5	21	8	18	3	33	9	3	9	124	12	0	33 (2022)
72.	Grey Phalarope	2	1	1	0	1	0	1	5	1	0	12	1.2	1	5 (2023)
73.	Common Sandpiper	3	0	5	3	3	5	1	5	1	6	32	3.2	0	6 (2025)
74.	Green Sandpiper	0	4	2	4	2	0	4	0	1	2	19	1.9	0	4 (2017)
75.	Wood Sandpiper	3	1	0	0	0	2	1	1	0	0	8	0.8	0	3 (2016)
76.	Redshank	67	62	111	117	342	94	147	63	108	196	1307	131	0	342 (2020)
77.	Spotted Redshank	3	1	0	12	1	3	16	0	1	6	43	4.3	0	16 (2022)
78.	Greenshank	9	15	9	23	8	18	16	1	5	50	154	15	0	50 (2025)
79.	Turnstone	108	36	21	66	69	84	77	111	17	95	684	68	1	111 (2023)
80.	Knot	966	360	527	391	2351	686	1295	208	334	2666	9784	978	0	2666 (2025)
81.	Ruff	21	33	50	126	26	0	41	6	4	26	333	33	0	126 (2019)
82.	wader sp.	547	635	29	396	115	220	33	10	26	77	2088	209	0	635 (2017)
83.	small wader	0	0	0	0	0	0	0	0	0	6	6	0.6	0	6 (2025)
84.	large wader	0	0	0	0	0	56	868	0	0	0	924	92	0	868 (2022)
85.	Curlew Sandpiper	4	17	6	5	8	8	3	2	3	4	60	6	0	17 (2017)
86.	Temminck's Stint	1	0	1	0	0	0	0	0	0	1	3	0.3	0	1 (2016)
87.	Sanderling	3259	2741	1172	1544	4437	1893	900	1827	980	1714	20467	2047	581	4437 (2020)
88.	Dunlin	3443	2132	1654	2275	2684	4391	6191	4814	763	7331	35678	3568	6	7331 (2025)
89.	Purple Sandpiper	1	5	0	0	5	1	0	4	5	2	23	2.3	0	5 (2017)
90.	Little Stint	9	8	2	2	4	1	4	11	2	3	46	4.6	0	11 (2023)
91.	Calidris sp.	791	624	115	38	215	163	99	51	84	175	2355	236	0	791 (2016)
92.	Little Tern	218	184	107	298	486	461	342	56	84	351	2587	259	0	486 (2020)
93.	Gull-billed Tern	0	0	2	0	1	1	0	0	0	2	6	0.6	0	2 (2018)
94.	Caspian Tern	3	2	0	1	3	2	0	5	0	2	18	1.8	0	5 (2023)
95.	Whiskered Tern	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2024)
96.	Black Tern	112	321	99	353	857	2408	260	495	258	342	5505	551	6	2408 (2021)
97.	White-winged Black Tern	0	0	0	0	0	7	0	1	1	2	11	1.1	0	7 (2021)
98.	Arctic Tern	958	199	248	138	166	279	487	55	237	111	2878	288	34	958 (2016)
99.	Common/Arctic Tern	2170	5272	2153	7508	15598	34566	8455	12991	12406	18027	119146	11915	204	34566 (2021)
100.	Common Tern	4894	3100	2627	4106	6094	5956	4866	6827	2170	1501	42141	4214	435	6827 (2023)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
101.	Roseate Tern	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2020)
102.	sterna sp.	0	0	0	0	0	0	0	0	6	0	6	0.6	0	6 (2024)
103.	Sandwich Tern	7654	11840	13461	10855	14618	27851	6282	7088	4580	11137	115366	11537	293	27851 (2021)
104.	Little Gull	3653	16727	989	13790	10427	41392	6242	6719	870	7243	108052	10805	2517	41392 (2021)
105.	Kittiwake	2516	4237	2404	888	7369	2058	2162	4525	1000	166	27325	2733	2077	7369 (2020)
106.	Sabine's Gull	0	3	1	0	1	0	0	3	2	0	10	1	0	3 (2017)
107.	Black-headed Gull	12244	13158	6197	19710	17222	25755	22676	6915	10569	10087	144533	14453	1215	25755 (2021)
108.	Laughing Gull	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2019)
109.	Mediterranean Gull	23	44	35	98	65	234	44	44	43	68	698	70	4	234 (2021)
110.	Common Gull	8612	8865	5304	11267	16592	17354	14818	11876	5282	9283	109253	10925	2070	17354 (2021)
111.	Caspian Gull	8	3	6	4	4	9	13	17	4	9	77	7.7	1	17 (2023)
112.	Herring Gull	0	1	0	0	0	0	0	1	0	6	8	0.8	0	6 (2025)
113.	L. argentatus x L. hyperboreus	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2021)
114.	Yellow-legged Gull	2	3	2	1	2	6	5	2	0	5	28	2.8	2	6 (2021)
115.	Great Black-backed Gull	212	437	5	4	16	32	51	26	37	54	874	87	28	437 (2017)
116.	Glaucous Gull	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2023)
117.	Lesser Black-backed Gull	56	164	26	39	71	242	63	26	8	323	1018	102	12	323 (2025)
118.	Laridae sp.	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2023)
119.	Iceland Gull	2	2	0	2	0	1	0	0	1	0	8	0.8	0	2 (2016)
120.	Long-tailed Skua	1	3	0	0	5	3	5	8	3	3	31	3.1	3	8 (2023)
121.	skua sp.	3	22	16	15	13	31	12	19	4	15	150	15	3	31 (2021)
122.	Arctic Skua	31	78	52	61	47	400	89	213	22	74	1067	107	7	400 (2021)
123.	S. parasiticus / pomarinus	1	0	0	3	0	1	0	5	0	0	10	1	0	5 (2023)
124.	Pomarine Skua	8	16	13	39	12	10	5	5	0	7	115	12	1	39 (2019)
125.	Great Skua	12	48	28	15	17	33	0	10	1	7	171	17	3	48 (2017)
126.	Puffin	3	1	0	1	3	2	3	2	0	0	15	1.5	0	3 (2016)
127.	Black Guillemot	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2019)
128.	Razorbill	29	28	34	21	42	19	51	183	11	3	421	42	20	183 (2023)
129.	Razorbill/Guillemot	4545	2009	3963	2072	7701	3694	3877	3422	1185	179	32647	3265	251	7701 (2020)
130.	alca / fratercula spec	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2025)
131.	Little Auk	8	2	0	0	3	3	12	0	5	1	34	3.4	2	12 (2022)
132.	Guillemot	634	232	45	205	120	237	109	106	78	8	1774	177	84	634 (2016)
133.	Red-throated Diver	3420	410	901	519	542	974	2785	1590	504	377	12022	1202	522	3420 (2016)
134.	Black-throated Diver	18	27	7	9	26	52	19	7	15	5	185	19	0	52 (2021)
135.	Great Northern Diver	2	2	0	1	1	1	2	3	2	0	14	1.4	1	3 (2023)
136.	diver sp.	1317	3041	3156	1736	5440	7275	3449	2665	2449	875	31403	3140	768	7275 (2021)
137.	Great Northern/Yellow-billed Diver	0	0	1	0	0	1	0	0	0	0	2	0.2	0	1 (2018)
138.	Storm Petrel	0	2	0	0	0	0	0	0	0	0	2	0.2	0	2 (2017)
139.	storm-petrel sp.	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
140.	Leach's Petrel	1	5	27	0	4	5	2	4	1	2	51	5.1	0	27 (2018)
141.	Fulmar	3	11	6	4	8	56	6	2	21	5	122	12	0	56 (2021)
142.	Sooty Shearwater	60	9	9	1	10	25	75	35	9	47	280	28	0	75 (2022)
143.	Manx Shearwater	6	5	17	3	0	1	3	6	1	32	74	7.4	0	32 (2025)
144.	Balearic Shearwater	2	0	0	0	0	0	4	1	0	0	7	0.7	0	4 (2022)
145.	Gannet	1489	939	1759	516	1280	2005	987	4399	1814	2303	17491	1749	290	4399 (2023)
146.	Cormorant	203	450	226	0	527	10346	1111	346	1603	9322	24134	2413	212	10346 (2021)
147.	Spoonbill	100	88	2	21	52	327	5	138	46	44	823	82	0	327 (2021)
148.	Little Egret	0	2	2	0	1	0	0	1	0	2	8	0.8	0	2 (2017)
149.	Great White Egret	4	1	2	2	7	4	19	2	9	4	54	5.4	0	19 (2022)
150.	Grey Heron	26	6	11	27	27	12	11	21	11	23	175	18	0	27 (2019)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
151.	Purple Heron	0	0	0	0	2	0	0	0	0	0	2	0.2	0	2 (2020)
152.	Osprey	0	2	0	1	1	0	3	0	0	2	9	0.9	0	3 (2022)
153.	Sparrowhawk	2	2	1	0	3	2	0	1	2	0	13	1.3	0	3 (2020)
154.	Marsh Harrier	0	0	2	5	2	2	0	1	0	0	12	1.2	0	5 (2019)
155.	Hen Harrier	0	1	1	1	1	1	2	0	1	0	8	0.8	0	2 (2022)
156.	White-tailed Eagle	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
157.	Rough-legged Buzzard	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2024)
158.	Common Buzzard	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
159.	Short-eared Owl	1	1	0	1	0	0	0	0	0	0	3	0.3	0	1 (2016)
160.	Kestrel	0	7	3	0	3	0	0	2	0	4	19	1.9	0	7 (2017)
161.	Merlin	1	5	4	6	3	0	2	0	0	3	24	2.4	0	6 (2019)
162.	Hobby	0	1	0	1	1	0	0	0	0	0	3	0.3	0	1 (2017)
163.	Peregrine	7	4	4	4	4	3	1	5	2	0	34	3.4	0	7 (2016)
164.	Rose-ringed Parakeet	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
165.	Jackdaw	0	6	0	0	3	0	0	0	0	0	9	0.9	0	6 (2017)
166.	Rook	4	2	1	1	0	3	3	2	0	2	18	1.8	0	4 (2016)
167.	Carrion Crow	2	0	0	0	0	0	0	0	0	1	3	0.3	0	2 (2016)
168.	Blue Tit	1	3	0	0	0	0	0	0	0	0	4	0.4	0	3 (2017)
169.	Skylark	14	695	0	21	0	13	3	71	2	7	826	83	0	695 (2017)
170.	Shore Lark	0	4	0	0	0	0	8	10	0	2	24	2.4	0	10 (2023)
171.	Sand Martin	12	7	3	15	1	0	0	0	0	18	56	5.6	0	18 (2025)
172.	Swallow	116	41	2	15	20	0	7	2	4	39	246	25	0	116 (2016)
173.	House Martin	0	0	0	4	0	0	0	0	2	1	7	0.7	0	4 (2019)
174.	Zitting Cisticola	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2023)
175.	Starling	386	168	0	4	73	468	349	3811	41	4506	9806	981	0	4506 (2025)
176.	Redwing	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
177.	Fieldfare	0	0	710	0	0	0	0	0	0	0	710	71	0	710 (2018)
178.	House Sparrow	0	0	0	0	0	0	2	0	0	0	2	0.2	0	2 (2022)
179.	Blue-headed Wagtail	2	0	0	3	0	5	0	0	1	6	17	1.7	0	6 (2025)
180.	Yellow Wagtail (flavissima)	0	0	0	0	1	0	0	0	0	1	2	0.2	0	1 (2020)
181.	Grey-headed Wagtail	0	0	1	0	1	0	0	0	2	0	4	0.4	0	2 (2024)
182.	Yellow wagtail sp.	1	9	2	0	0	1	0	0	0	5	18	1.8	0	9 (2017)
183.	Grey Wagtail	10	4	5	0	1	1	0	12	0	12	45	4.5	0	12 (2023)
184.	White Wagtail	35	0	2	25	1	10	3	0	5	0	81	8.1	1	35 (2016)
185.	alba wagtail sp.	24	53	18	7	9	16	2	1	1	12	143	14	0	53 (2017)
186.	Pied Wagtail	0	1	0	0	0	0	0	0	0	2	3	0.3	0	2 (2025)
187.	Meadow Pipit	8	2	0	0	1	0	0	2	0	3	16	1.6	0	8 (2016)
188.	Tree Pipit	1	1	2	0	0	1	0	0	0	0	5	0.5	0	2 (2018)
189.	Red-throated Pipit	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
190.	Water Pipit	0	0	0	0	0	0	0	0	0	2	2	0.2	0	2 (2025)
191.	Rock Pipit	10	3	1	2	1	4	1	0	1	5	28	2.8	0	10 (2016)
192.	Rock Pipit/Water Pipit	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
193.	Chaffinch	0	0	0	0	0	0	0	10	0	0	10	1	0	10 (2023)
194.	Brambling	0	1	0	1	0	0	0	0	0	0	2	0.2	0	1 (2017)
195.	Common Rosefinch	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
196.	Greenfinch	2	0	0	0	0	0	0	0	0	0	2	0.2	0	2 (2016)
197.	Twite	0	0	2	0	0	0	0	0	0	0	2	0.2	0	2 (2018)
198.	Linnet	6	3	0	0	1	0	0	0	0	0	10	1	0	6 (2016)
199.	Mealy Redpoll	0	4	81	0	0	0	0	0	0	0	85	8.5	0	81 (2018)
200.	Lesser Redpoll	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2025)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
201.	Redpoll	0	2	0	0	0	0	0	0	0	0	2	0.2	0	2 (2017)
202.	Serin	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2019)
203.	Siskin	0	2	0	0	1	0	0	0	0	1	4	0.4	0	2 (2017)
204.	Lapland Bunting	1	0	0	1	1	0	0	0	0	0	3	0.3	0	1 (2016)
205.	Snow Bunting	12	7	4	4	1	6	10	5	1	4	54	5.4	0	12 (2016)
206.	Yellowhammer	0	0	0	0	0	0	0	0	0	1	1	0.1	0	1 (2025)
207.	Reed Bunting	1	8	0	0	0	0	0	0	0	0	9	0.9	1	8 (2017)
	Other species
1.	Harbour Porpoise	177	82	78	44	83	227	57	52	55	25	880	88	18	227 (2021)
2.	Humpback whale	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2024)
3.	whale sp.	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
4.	Grey seal	1	3	3	1	1	5	2	1	0	0	17	1.7	1	5 (2021)
5.	Common Seal	5	11	9	3	6	14	5	1	1	3	58	5.8	6	14 (2021)
6.	Common / Grey seal	0	0	0	2	3	0	0	1	0	0	6	0.6	0	3 (2020)
	Other species
1.	Small Tortoiseshell	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
2.	Brimstone	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2019)
3.	European Peacock	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2019)
4.	white sp. (butterfly)	69	3	7	11	9	1	1	0	0	0	101	10	0	69 (2016)
5.	Red Admiral	8	0	0	5	0	0	0	0	0	0	13	1.3	0	8 (2016)
6.	Painted Lady	0	0	0	2	0	0	0	0	0	0	2	0.2	0	2 (2019)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
	Totals	108722	128835	86902	111015	211323	272181	131744	117765	129882	129084	1427453	142745	29769
	Observation hours	255:10	279:45	208:14	246:10	300:06	324:30	220:06	226:59	166:30	234:00	2,461:30	246:09

Trektellen

Totals Castricum aan Zee (zeetrek) 2016 - 2025