Select until 10 April

Totals Katwijk - Savoy (zeetrek) 2016 - 2025

	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
1.	Dark-bellied Brent Goose	229	832	411	867	4070	1187	294	3093	398	160	11541	1154	5	4070 (2020)
2.	Pale-bellied Brent Goose	0	0	0	0	2	0	0	0	0	0	2	0.2	0	2 (2020)
3.	Black Brant	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
4.	Red-breasted Goose	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
5.	Canada Goose	0	18	0	16	19	8	17	32	5	36	151	15	0	36 (2025)
6.	Barnacle Goose	54	330	384	509	2816	2795	775	234	914	245	9056	906	0	2816 (2020)
7.	Greylag Goose	0	73	92	117	59	130	65	79	24	51	690	69	5	130 (2021)
8.	Anser sp.	0	0	215	54	280	0	0	0	0	0	549	55	0	280 (2020)
9.	goose sp.	0	0	262	500	360	67	94	60	69	0	1412	141	0	500 (2019)
10.	Pink-footed Goose	0	24	201	216	120	0	2	65	0	0	628	63	0	216 (2019)
11.	Tundra Bean Goose	0	0	61	23	55	6	0	0	0	0	145	15	0	61 (2018)
12.	Eurasian White-fronted Goose	0	1	79	220	47	19	130	88	0	0	584	58	0	220 (2019)
13.	Black Swan	0	0	0	0	0	0	2	0	0	0	2	0.2	0	2 (2022)
14.	Mute Swan	0	27	2	9	30	12	0	18	11	0	109	11	2	30 (2020)
15.	Bewick's Swan	0	0	3	0	0	0	0	0	0	0	3	0.3	0	3 (2018)
16.	Whooper Swan	0	0	1	0	0	0	0	0	0	0	1	0.1	2	1 (2018)
17.	swan sp.	0	0	2	0	0	0	0	0	0	0	2	0.2	0	2 (2018)
18.	Egyptian Goose	4	45	45	15	37	22	113	43	24	32	380	38	1	113 (2022)
19.	Shelduck	316	694	358	1183	1070	319	1081	1074	155	20	6270	627	7	1183 (2019)
20.	Mandarin	0	0	0	0	0	1	4	0	0	0	5	0.5	0	4 (2022)
21.	Garganey	1	12	0	0	6	2	13	3	7	0	44	4.4	0	13 (2022)
22.	Shoveler	3	376	23	78	514	121	99	45	23	65	1347	135	0	514 (2020)
23.	Gadwall	2	26	8	40	64	39	36	15	7	4	241	24	0	64 (2020)
24.	Wigeon	64	389	1451	1011	648	890	298	1425	188	465	6829	683	249	1451 (2018)
25.	Mallard	2	4	2	11	70	5	1	2	0	0	97	9.7	0	70 (2020)
26.	Pintail	17	71	42	21	75	29	65	54	52	14	440	44	1	75 (2020)
27.	Teal	62	421	331	197	645	504	265	354	149	628	3556	356	18	645 (2020)
28.	dabbling duck sp.	2	0	1200	0	0	0	4	0	0	0	1206	121	0	1200 (2018)
29.	duck sp.	2	22	79	4	24	68	27	94	6	156	482	48	0	156 (2025)
30.	Red-crested Pochard	0	1	0	0	0	0	1	0	0	0	2	0.2	0	1 (2017)
31.	Pochard	0	2	34	9	2	5	11	4	0	0	67	6.7	0	34 (2018)
32.	Tufted Duck	7	33	22	25	35	40	6	27	12	7	214	21	0	40 (2021)
33.	Scaup	0	1	1	4	19	28	13	3	7	0	76	7.6	0	28 (2021)
34.	Aythya sp.	0	0	0	20	4	1	0	0	0	0	25	2.5	0	20 (2019)
35.	Eider	16	129	103	160	193	169	124	124	100	57	1175	118	10	193 (2020)
36.	Velvet Scoter	5	54	38	133	42	47	44	59	18	1	441	44	4	133 (2019)
37.	Common Scoter	692	2131	1785	2705	4182	4907	3336	6832	3505	559	30634	3063	717	6832 (2023)
38.	Long-tailed Duck	0	2	1	4	1	1	0	0	0	0	9	0.9	0	4 (2019)
39.	Goldeneye	0	5	18	10	29	7	2	20	4	0	95	9.5	2	29 (2020)
40.	Smew	0	0	4	1	0	0	0	1	0	0	6	0.6	1	4 (2018)
41.	Goosander	0	5	25	4	9	9	0	1	0	0	53	5.3	0	25 (2018)
42.	Red-breasted Merganser	28	192	69	112	155	180	158	190	68	37	1189	119	7	192 (2017)
43.	Swift	2	111	0	1	3	19	0	42	0	0	178	18	0	111 (2017)
44.	Woodpigeon	0	0	0	2	4	0	2	412	0	0	420	42	0	412 (2023)
45.	Collared Dove	0	0	0	0	0	0	1	2	0	0	3	0.3	0	2 (2023)
46.	Red-necked Grebe	0	2	3	5	1	0	1	0	0	0	12	1.2	1	5 (2019)
47.	Great Crested Grebe	136	344	1707	1023	388	393	414	263	120	17	4805	481	1045	1707 (2018)
48.	Slavonian Grebe	0	2	2	1	1	0	0	0	0	0	6	0.6	0	2 (2017)
49.	Black-necked Grebe	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
50.	Black-necked / Slavonian Grebe	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
51.	grebe sp.	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2023)
52.	Oystercatcher	28	249	95	160	255	297	216	256	115	31	1702	170	203	297 (2021)
53.	Avocet	0	1	1	7	131	2	34	6	0	27	209	21	0	131 (2020)
54.	Grey Plover	13	22	8	116	208	478	430	340	41	4	1660	166	1	478 (2021)
55.	Golden Plover	3	13	9	20	1	68	15	20	2	0	151	15	0	68 (2021)
56.	Dotterel	4	0	0	2	8	0	2	2	0	0	18	1.8	0	8 (2020)
57.	Ringed Plover	19	55	14	176	503	361	132	221	16	6	1503	150	4	503 (2020)
58.	Little Ringed Plover	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2023)
59.	Lapwing	0	0	3	2	1	623	1	6	1	0	637	64	0	623 (2021)
60.	Whimbrel	25	159	33	223	1024	845	448	268	89	8	3122	312	6	1024 (2020)
61.	Curlew	18	36	21	62	81	41	30	46	48	6	389	39	0	81 (2020)
62.	Bar-tailed Godwit	304	31	15	80	650	518	1188	87	2149	4	5026	503	14	2149 (2024)
63.	Black-tailed Godwit	0	0	1	2	6	0	1	0	0	0	10	1	0	6 (2020)
64.	Woodcock	0	1	0	1	1	1	0	2	0	0	6	0.6	0	2 (2023)
65.	Snipe	1	9	1	4	0	39	17	1	0	0	72	7.2	0	39 (2021)
66.	Grey Phalarope	1	7	0	3	1	1	7	4	0	0	24	2.4	0	7 (2017)
67.	Common Sandpiper	15	7	0	0	0	13	0	1	0	0	36	3.6	20	15 (2016)
68.	Green Sandpiper	0	0	0	2	0	4	2	0	0	0	8	0.8	0	4 (2021)
69.	Wood Sandpiper	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2016)
70.	Redshank	12	8	22	56	51	47	111	16	2	1	326	33	1	111 (2022)
71.	Spotted Redshank	0	0	0	1	0	1	1	2	0	0	5	0.5	0	2 (2023)
72.	Greenshank	0	1	0	3	2	16	39	5	1	0	67	6.7	0	39 (2022)
73.	Turnstone	31	39	6	110	53	81	15	46	15	0	396	40	5	110 (2019)
74.	Knot	6	17	23	129	74	90	192	63	27	0	621	62	1	192 (2022)
75.	Ruff	4	6	1	4	9	0	43	4	0	0	71	7.1	0	43 (2022)
76.	wader sp.	30	23	2	19	253	144	86	40	35	29	661	66	0	253 (2020)
77.	large wader	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2023)
78.	Curlew Sandpiper	0	3	0	2	2	0	1	1	0	0	9	0.9	0	3 (2017)
79.	Sanderling	171	661	147	213	632	474	462	1099	155	13	4027	403	360	1099 (2023)
80.	Dunlin	25	375	112	271	670	582	632	867	50	45	3629	363	8	867 (2023)
81.	Purple Sandpiper	4	4	1	4	8	6	2	6	0	0	35	3.5	0	8 (2020)
82.	Little Stint	0	0	0	3	0	1	2	5	0	0	11	1.1	0	5 (2023)
83.	Little / Temminck's Stint	0	0	0	0	0	0	0	1	2	0	3	0.3	0	2 (2024)
84.	Calidris sp.	23	40	2	42	206	140	106	116	27	10	712	71	0	206 (2020)
85.	Little Tern	43	23	13	34	165	85	53	116	77	0	609	61	8	165 (2020)
86.	Gull-billed Tern	0	0	0	0	0	0	0	2	0	0	2	0.2	0	2 (2023)
87.	Caspian Tern	1	1	0	5	1	2	1	2	0	0	13	1.3	0	5 (2019)
88.	Black Tern	4	3	14	40	471	601	106	27	14	0	1280	128	5	601 (2021)
89.	White-winged Black Tern	0	0	0	0	2	0	0	0	0	0	2	0.2	0	2 (2020)
90.	Arctic Tern	14	9	5	20	35	41	33	112	60	0	329	33	0	112 (2023)
91.	Common/Arctic Tern	242	631	95	789	1838	2656	869	1989	814	0	9923	992	0	2656 (2021)
92.	Common Tern	329	1333	355	2109	10438	5701	4616	4018	1625	270	30794	3079	923	10438 (2020)
93.	Sandwich Tern	836	844	1166	3777	2536	3427	2651	1786	1131	305	18459	1846	127	3777 (2019)
94.	Little Gull	46	117	82	232	3318	7054	3496	2381	161	15	16902	1690	57	7054 (2021)
95.	Kittiwake	406	420	2000	1164	2591	2343	756	4202	569	1	14452	1445	25	4202 (2023)
96.	Sabine's Gull	0	3	1	2	2	0	2	3	1	0	14	1.4	0	3 (2017)
97.	Black-headed Gull	2949	7153	3561	6808	8030	15294	2680	3773	617	387	51252	5125	2106	15294 (2021)
98.	Mediterranean Gull	18	19	9	50	22	222	39	33	7	3	422	42	9	222 (2021)
99.	Common Gull	205	2629	844	2454	3689	2446	1202	3499	352	40	17360	1736	513	3689 (2020)
100.	Caspian Gull	0	0	0	0	2	1	0	0	3	0	6	0.6	1	3 (2024)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
101.	Herring Gull	654	1143	894	700	1355	252	165	251	27	170	5611	561	880	1355 (2020)
102.	Yellow-legged Gull	1	1	1	0	0	1	0	0	0	0	4	0.4	0	1 (2016)
103.	Great Black-backed Gull	60	302	305	324	624	174	102	158	41	3	2093	209	110	624 (2020)
104.	Glaucous Gull	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2021)
105.	Lesser Black-backed Gull	5696	1305	2429	3114	3348	578	574	3021	708	456	21229	2123	1698	5696 (2016)
106.	Iceland Gull	0	0	1	0	0	0	2	1	0	0	4	0.4	0	2 (2022)
107.	Long-tailed Skua	2	1	1	1	8	3	4	7	3	0	30	3	0	8 (2020)
108.	skua sp.	7	24	15	30	12	35	25	21	10	0	179	18	1	35 (2021)
109.	Arctic Skua	5	63	31	109	16	121	67	125	13	0	550	55	4	125 (2023)
110.	S. parasiticus / pomarinus	0	0	1	0	0	0	0	0	1	0	2	0.2	0	1 (2018)
111.	Pomarine Skua	5	19	17	20	3	8	6	5	0	0	83	8.3	0	20 (2019)
112.	Great Skua	11	67	31	30	10	4	5	4	6	0	168	17	0	67 (2017)
113.	Puffin	0	2	1	0	0	1	0	0	1	0	5	0.5	0	2 (2017)
114.	Razorbill	0	3	8	22	84	14	2	373	2	0	508	51	23	373 (2023)
115.	Razorbill/Guillemot	890	341	2651	6065	3141	5048	12477	2627	241	0	33481	3348	36	12477 (2022)
116.	Little Auk	4	1	1	4	0	0	4	1	0	0	15	1.5	1	4 (2016)
117.	Guillemot	26	50	1562	1275	1333	532	2255	64	56	0	7153	715	38	2255 (2022)
118.	Red-throated Diver	436	231	7066	5546	3933	4417	3099	2504	690	36	27958	2796	68	7066 (2018)
119.	Black-throated Diver	2	7	6	4	6	9	6	11	2	0	53	5.3	2	11 (2023)
120.	Great Northern Diver	2	1	3	3	0	0	2	3	0	0	14	1.4	0	3 (2018)
121.	diver sp.	4	24	34	4	10	33	17	9	12	0	147	15	0	34 (2018)
122.	Storm Petrel	0	0	0	0	0	1	0	1	0	0	2	0.2	0	1 (2021)
123.	storm-petrel sp.	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2023)
124.	Leach's Petrel	2	30	40	4	2	3	3	2	0	0	86	8.6	0	40 (2018)
125.	Fulmar	1	2	10	3	3	62	4	0	18	0	103	10	0	62 (2021)
126.	Sooty Shearwater	19	17	13	3	10	15	29	22	6	0	134	13	0	29 (2022)
127.	Manx Shearwater	1	25	19	6	2	1	0	10	2	0	66	6.6	0	25 (2017)
128.	Balearic Shearwater	0	1	0	1	0	1	0	1	0	0	4	0.4	0	1 (2017)
129.	shearwater sp.	1	1	4	1	0	2	0	3	0	0	12	1.2	0	4 (2018)
130.	Gannet	361	539	525	583	537	603	825	5072	365	12	9422	942	21	5072 (2023)
131.	Cormorant	920	3246	4006	9191	4590	4534	4508	3490	1682	361	36528	3653	535	9191 (2019)
132.	Shag	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2019)
133.	Spoonbill	120	23	31	2	66	93	55	10	1	3	404	40	0	120 (2016)
134.	Little Egret	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2020)
135.	Great White Egret	0	0	1	0	0	3	9	0	0	0	13	1.3	0	9 (2022)
136.	Grey Heron	3	2	1	17	38	18	18	20	35	7	159	16	5	38 (2020)
137.	Purple Heron	0	0	0	3	0	0	5	0	0	0	8	0.8	0	5 (2022)
138.	Osprey	0	2	0	0	0	0	1	0	0	0	3	0.3	0	2 (2017)
139.	Sparrowhawk	0	7	2	1	1	1	1	2	1	0	16	1.6	0	7 (2017)
140.	Marsh Harrier	1	1	0	0	13	2	2	1	1	0	21	2.1	0	13 (2020)
141.	Hen Harrier	0	1	1	1	2	3	0	2	0	0	10	1	0	3 (2021)
142.	Red Kite	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
143.	White-tailed Eagle	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2021)
144.	Common Buzzard	0	0	0	0	3	2	0	0	0	0	5	0.5	0	3 (2020)
145.	Short-eared Owl	0	0	0	1	0	0	0	1	0	0	2	0.2	0	1 (2019)
146.	Kingfisher	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2020)
147.	Great Spotted Woodpecker	0	1	0	0	0	0	1	1	0	0	3	0.3	0	1 (2017)
148.	Kestrel	2	8	1	7	8	2	0	1	1	0	30	3	1	8 (2017)
149.	Merlin	2	5	2	3	8	3	3	5	1	0	32	3.2	0	8 (2020)
150.	Hobby	2	2	1	0	0	0	0	7	0	0	12	1.2	0	7 (2023)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
151.	Peregrine	3	9	2	9	2	3	3	4	0	0	35	3.5	1	9 (2017)
152.	Rose-ringed Parakeet	0	0	4	0	0	0	0	0	0	0	4	0.4	0	4 (2018)
153.	Jay	0	0	0	18	0	0	0	0	0	0	18	1.8	0	18 (2019)
154.	Magpie	0	1	0	0	0	0	6	0	0	0	7	0.7	0	6 (2022)
155.	Jackdaw	0	0	0	100	10	0	202	0	0	0	312	31	14	202 (2022)
156.	Rook	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2020)
157.	Carrion Crow	0	0	0	0	1	0	1	0	1	2	5	0.5	2	2 (2025)
158.	Blue Tit	0	0	0	0	0	0	14	0	0	0	14	1.4	0	14 (2022)
159.	Great Tit	0	0	0	0	0	0	3	0	0	0	3	0.3	0	3 (2022)
160.	Wood Lark	0	0	0	2	1	2	0	8	0	0	13	1.3	0	8 (2023)
161.	Skylark	12	215	10	26	133	96	8	79	15	0	594	59	0	215 (2017)
162.	Shore Lark	0	11	0	1	2	6	0	0	0	0	20	2	0	11 (2017)
163.	Sand Martin	0	3	0	1	31	12	5	0	2	0	54	5.4	0	31 (2020)
164.	Swallow	69	106	39	82	165	89	174	30	12	0	766	77	15	174 (2022)
165.	House Martin	12	18	3	45	4	15	1	2	0	0	100	10	0	45 (2019)
166.	Chiffchaff/Willow Warbler	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2022)
167.	Starling	240	75921	997	8546	44706	6999	8800	88052	186	5	234452	23445	91	88052 (2023)
168.	Song Thrush	2	1	0	36	4	5	10	6	0	0	64	6.4	0	36 (2019)
169.	Mistle Thrush	0	0	0	0	0	0	0	2	0	0	2	0.2	0	2 (2023)
170.	Redwing	0	504	1	11	2	255	0	6	0	0	779	78	0	504 (2017)
171.	Blackbird	0	3	0	1	0	2	4	1	0	0	11	1.1	0	4 (2022)
172.	Fieldfare	0	1521	0	1	141	45	0	29	0	0	1737	174	0	1521 (2017)
173.	Whinchat	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2024)
174.	Stonechat	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2024)
175.	Wheatear	0	2	0	0	7	0	1	1	1	0	12	1.2	0	7 (2020)
176.	Tree Sparrow	0	0	0	1	0	0	0	1	0	0	2	0.2	0	1 (2019)
177.	Dunnock	0	0	0	0	0	0	0	5	0	0	5	0.5	0	5 (2023)
178.	Blue-headed Wagtail	26	0	1	6	76	0	4	1	2	0	116	12	0	76 (2020)
179.	Yellow Wagtail (flavissima)	0	0	0	0	1	0	1	0	0	0	2	0.2	0	1 (2020)
180.	Grey-headed Wagtail	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2020)
181.	Yellow wagtail sp.	25	4	6	54	15	53	69	13	6	0	245	25	0	69 (2022)
182.	Grey Wagtail	4	8	2	45	18	7	4	37	3	0	128	13	0	45 (2019)
183.	White Wagtail	11	24	34	20	19	11	19	7	3	5	153	15	4	34 (2018)
184.	alba wagtail sp.	1	8	1	77	38	13	29	58	11	1	237	24	0	77 (2019)
185.	Pied Wagtail	0	1	0	0	0	0	0	0	1	0	2	0.2	0	1 (2017)
186.	Richard's Pipit	0	1	0	1	0	0	0	0	0	0	2	0.2	0	1 (2017)
187.	Meadow Pipit	415	533	245	1290	551	416	647	2519	389	2	7007	701	36	2519 (2023)
188.	Tree Pipit	0	0	0	4	1	3	3	2	0	0	13	1.3	0	4 (2019)
189.	Rock Pipit	3	26	3	8	3	10	4	4	0	0	61	6.1	3	26 (2017)
190.	Rock Pipit/Water Pipit	0	0	0	2	2	0	0	0	1	0	5	0.5	0	2 (2019)
191.	Chaffinch	0	819	19	2565	6065	6	2143	8245	0	0	19862	1986	0	8245 (2023)
192.	Brambling	0	31	0	6	14	0	3	15	0	0	69	6.9	0	31 (2017)
193.	Greenfinch	0	12	5	12	16	0	4	21	0	0	70	7	0	21 (2023)
194.	Twite	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2023)
195.	Linnet	23	37	4	41	53	46	27	136	7	0	374	37	4	136 (2023)
196.	Mealy Redpoll	0	0	30	0	0	0	0	1	0	0	31	3.1	0	30 (2018)
197.	redpoll sp.	0	1	1	1	1	1	0	15	0	0	20	2	0	15 (2023)
198.	Crossbill	0	1	0	5	8	0	0	12	0	0	26	2.6	0	12 (2023)
199.	Goldfinch	1	20	14	1	50	5	1	16	0	0	108	11	0	50 (2020)
200.	Siskin	0	1	11	15614	265	1	320	2862	1	0	19075	1908	0	15614 (2019)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
201.	Lapland Bunting	3	0	0	1	1	1	0	1	0	0	7	0.7	0	3 (2016)
202.	Snow Bunting	0	6	0	1	4	3	1	2	0	0	17	1.7	5	6 (2017)
203.	Yellowhammer	0	4	0	3	0	0	0	3	0	0	10	1	0	4 (2017)
204.	Reed Bunting	3	1	2	13	17	0	10	29	0	0	75	7.5	0	29 (2023)
205.	bunting sp.	0	0	2	0	0	0	0	0	0	0	2	0.2	0	2 (2018)
206.	passerine sp.	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
	Other species
1.	Harbour Porpoise	6	11	35	70	59	31	26	33	9	3	283	28	2	70 (2019)
2.	dolphin sp.	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2021)
3.	Grey seal	3	1	0	0	1	1	3	0	0	0	9	0.9	0	3 (2016)
4.	Common Seal	0	2	0	1	0	1	0	1	0	0	5	0.5	0	2 (2017)
5.	Common / Grey seal	0	0	0	0	0	1	0	1	0	0	2	0.2	0	1 (2021)
6.	Common Noctule	0	0	0	0	0	0	0	0	1	0	1	0.1	0	1 (2024)
	Species	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025	Totals	Average	Present	Year Maximum
	Totals	17577	108697	38914	84311	125706	81497	65047	160333	18651	4825	705558	70556	10074
	Observation hours	70:50	182:43	145:16	249:05	195:57	178:22	167:07	159:39	74:15	14:21	1,437:35	143:46

Trektellen

Totals Katwijk - Savoy (zeetrek) 2016 - 2025