Select until 13 March

Totals Katwijk - Savoy (zeetrek) 2017 - 2026

	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
1.	Dark-bellied Brent Goose	832	411	867	4070	1187	294	3093	398	1194	3	12349	1235	1	4070 (2020)
2.	Pale-bellied Brent Goose	0	0	0	2	0	0	0	0	1	0	3	0.3	0	2 (2020)
3.	Black Brant	1	0	0	0	0	0	0	0	0	0	1	0.1	0	1 (2017)
4.	Red-breasted Goose	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2022)
5.	Canada Goose	18	0	16	19	8	17	32	5	71	0	186	19	0	71 (2025)
6.	Barnacle Goose	330	384	509	2816	2795	775	234	914	861	645	10263	1026	0	2816 (2020)
7.	Greylag Goose	73	92	117	59	130	65	79	24	105	58	802	80	36	130 (2021)
8.	Anser sp.	0	215	54	280	0	0	0	0	0	0	549	55	0	280 (2020)
9.	goose sp.	0	262	500	360	67	94	60	69	64	12	1488	149	0	500 (2019)
10.	Pink-footed Goose	24	201	216	120	0	2	65	0	40	0	668	67	0	216 (2019)
11.	Tundra Bean Goose	0	61	23	55	6	0	0	0	0	0	145	15	0	61 (2018)
12.	Eurasian White-fronted Goose	1	79	220	47	19	130	88	0	638	196	1418	142	0	638 (2025)
13.	Black Swan	0	0	0	0	0	2	0	0	0	0	2	0.2	0	2 (2022)
14.	Mute Swan	27	2	9	30	12	0	18	11	2	2	113	11	3	30 (2020)
15.	Bewick's Swan	0	3	0	0	0	0	0	0	0	0	3	0.3	0	3 (2018)
16.	Whooper Swan	0	1	0	0	0	0	0	0	0	0	1	0.1	2	1 (2018)
17.	swan sp.	0	2	0	0	0	0	0	0	3	0	5	0.5	0	3 (2025)
18.	Egyptian Goose	45	45	15	37	22	113	43	24	32	0	376	38	1	113 (2022)
19.	Shelduck	694	358	1183	1070	319	1081	1074	155	1557	13	7504	750	9	1557 (2025)
20.	Mandarin	0	0	0	0	1	4	0	0	0	0	5	0.5	0	4 (2022)
21.	Garganey	12	0	0	6	2	13	3	7	0	0	43	4.3	0	13 (2022)
22.	Shoveler	376	23	78	514	121	99	45	23	75	0	1354	135	1	514 (2020)
23.	Gadwall	26	8	40	64	39	36	15	7	22	1	258	26	4	64 (2020)
24.	Wigeon	389	1451	1011	648	890	298	1425	188	822	190	7312	731	335	1451 (2018)
25.	Mallard	4	2	11	70	5	1	2	0	7	0	102	10	0	70 (2020)
26.	Pintail	71	42	21	75	29	65	54	52	43	12	464	46	1	75 (2020)
27.	Teal	421	331	197	645	504	265	354	149	743	92	3701	370	26	743 (2025)
28.	dabbling duck sp.	0	1200	0	0	0	4	0	0	0	0	1204	120	0	1200 (2018)
29.	duck sp.	22	79	4	24	68	27	94	6	156	0	480	48	0	156 (2025)
30.	Red-crested Pochard	1	0	0	0	0	1	0	0	0	0	2	0.2	0	1 (2017)
31.	Pochard	2	34	9	2	5	11	4	0	2	0	69	6.9	0	34 (2018)
32.	Tufted Duck	33	22	25	35	40	6	27	12	26	0	226	23	0	40 (2021)
33.	Scaup	1	1	4	19	28	13	3	7	8	1	85	8.5	0	28 (2021)
34.	Aythya sp.	0	0	20	4	1	0	0	0	0	0	25	2.5	0	20 (2019)
35.	Eider	129	103	160	193	169	124	124	100	239	37	1378	138	12	239 (2025)
36.	Velvet Scoter	54	38	133	42	47	44	59	18	6	0	441	44	4	133 (2019)
37.	Common Scoter	2131	1785	2705	4182	4907	3336	6832	3505	2324	184	31891	3189	742	6832 (2023)
38.	Long-tailed Duck	2	1	4	1	1	0	0	0	1	0	10	1	0	4 (2019)
39.	Goldeneye	5	18	10	29	7	2	20	4	1	0	96	9.6	2	29 (2020)
40.	Smew	0	4	1	0	0	0	1	0	0	0	6	0.6	1	4 (2018)
41.	Goosander	5	25	4	9	9	0	1	0	0	1	54	5.4	0	25 (2018)
42.	Red-breasted Merganser	192	69	112	155	180	158	190	68	143	32	1299	130	7	192 (2017)
43.	Swift	111	0	1	3	19	0	42	0	2	0	178	18	0	111 (2017)
44.	Woodpigeon	0	0	2	4	0	2	412	0	0	0	420	42	0	412 (2023)
45.	Collared Dove	0	0	0	0	0	1	2	0	0	0	3	0.3	0	2 (2023)
46.	Red-necked Grebe	2	3	5	1	0	1	0	0	0	0	12	1.2	1	5 (2019)
47.	Great Crested Grebe	344	1707	1023	388	393	414	263	120	77	22	4751	475	1262	1707 (2018)
48.	Slavonian Grebe	2	2	1	1	0	0	0	0	0	0	6	0.6	0	2 (2017)
49.	Black-necked Grebe	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2022)
50.	Black-necked / Slavonian Grebe	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2022)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
51.	grebe sp.	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2023)
52.	Oystercatcher	249	95	160	255	297	216	256	115	199	16	1858	186	221	297 (2021)
53.	Avocet	1	1	7	131	2	34	6	0	34	0	216	22	0	131 (2020)
54.	Grey Plover	22	8	116	208	478	430	340	41	204	0	1847	185	1	478 (2021)
55.	Golden Plover	13	9	20	1	68	15	20	2	8	0	156	16	0	68 (2021)
56.	Dotterel	0	0	2	8	0	2	2	0	0	0	14	1.4	0	8 (2020)
57.	Ringed Plover	55	14	176	503	361	132	221	16	387	3	1868	187	7	503 (2020)
58.	Little Ringed Plover	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2023)
59.	Lapwing	0	3	2	1	623	1	6	1	0	0	637	64	0	623 (2021)
60.	Whimbrel	159	33	223	1024	845	448	268	89	293	0	3382	338	6	1024 (2020)
61.	Curlew	36	21	62	81	41	30	46	48	33	0	398	40	0	81 (2020)
62.	Bar-tailed Godwit	31	15	80	650	518	1188	87	2149	195	0	4913	491	27	2149 (2024)
63.	Black-tailed Godwit	0	1	2	6	0	1	0	0	0	0	10	1	0	6 (2020)
64.	Woodcock	1	0	1	1	1	0	2	0	0	0	6	0.6	0	2 (2023)
65.	Snipe	9	1	4	0	39	17	1	0	2	0	73	7.3	0	39 (2021)
66.	Grey Phalarope	7	0	3	1	1	7	4	0	2	0	25	2.5	0	7 (2017)
67.	Common Sandpiper	7	0	0	0	13	0	1	0	8	0	29	2.9	20	13 (2021)
68.	Green Sandpiper	0	0	2	0	4	2	0	0	0	0	8	0.8	0	4 (2021)
69.	Redshank	8	22	56	51	47	111	16	2	107	0	420	42	1	111 (2022)
70.	Spotted Redshank	0	0	1	0	1	1	2	0	0	0	5	0.5	0	2 (2023)
71.	Greenshank	1	0	3	2	16	39	5	1	19	0	86	8.6	0	39 (2022)
72.	Turnstone	39	6	110	53	81	15	46	15	49	2	416	42	5	110 (2019)
73.	Knot	17	23	129	74	90	192	63	27	321	0	936	94	1	321 (2025)
74.	Ruff	6	1	4	9	0	43	4	0	2	0	69	6.9	0	43 (2022)
75.	wader sp.	23	2	19	253	144	86	40	35	84	0	686	69	0	253 (2020)
76.	large wader	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2023)
77.	Curlew Sandpiper	3	0	2	2	0	1	1	0	2	0	11	1.1	0	3 (2017)
78.	Sanderling	661	147	213	632	474	462	1099	155	1073	3	4919	492	364	1099 (2023)
79.	Dunlin	375	112	271	670	582	632	867	50	798	1	4358	436	8	867 (2023)
80.	Purple Sandpiper	4	1	4	8	6	2	6	0	1	0	32	3.2	0	8 (2020)
81.	Little Stint	0	0	3	0	1	2	5	0	0	0	11	1.1	0	5 (2023)
82.	Little / Temminck's Stint	0	0	0	0	0	0	1	2	1	0	4	0.4	0	2 (2024)
83.	Calidris sp.	40	2	42	206	140	106	116	27	119	1	799	80	0	206 (2020)
84.	Little Tern	23	13	34	165	85	53	116	77	262	0	828	83	8	262 (2025)
85.	Gull-billed Tern	0	0	0	0	0	0	2	0	3	0	5	0.5	0	3 (2025)
86.	Caspian Tern	1	0	5	1	2	1	2	0	0	0	12	1.2	0	5 (2019)
87.	Black Tern	3	14	40	471	601	106	27	14	184	0	1460	146	5	601 (2021)
88.	White-winged Black Tern	0	0	0	2	0	0	0	0	0	0	2	0.2	0	2 (2020)
89.	Arctic Tern	9	5	20	35	41	33	112	60	228	0	543	54	0	228 (2025)
90.	Common/Arctic Tern	631	95	789	1838	2656	869	1989	814	4048	0	13729	1373	0	4048 (2025)
91.	Common Tern	1333	355	2109	10438	5701	4616	4018	1625	3966	0	34161	3416	956	10438 (2020)
92.	Sandwich Tern	844	1166	3777	2536	3427	2651	1786	1131	2055	0	19373	1937	138	3777 (2019)
93.	Little Gull	117	82	232	3318	7054	3496	2381	161	837	3	17681	1768	69	7054 (2021)
94.	Kittiwake	420	2000	1164	2591	2343	756	4202	569	204	44	14293	1429	31	4202 (2023)
95.	Sabine's Gull	3	1	2	2	0	2	3	1	1	0	15	1.5	0	3 (2017)
96.	Black-headed Gull	7153	3561	6808	8030	15294	2680	3773	617	1557	116	49589	4959	2186	15294 (2021)
97.	Mediterranean Gull	19	9	50	22	222	39	33	7	13	0	414	41	10	222 (2021)
98.	Common Gull	2629	844	2454	3689	2446	1202	3499	352	395	164	17674	1767	581	3689 (2020)
99.	Caspian Gull	0	0	0	2	1	0	0	3	2	0	8	0.8	1	3 (2024)
100.	Herring Gull	1143	894	700	1355	252	165	251	27	460	88	5335	534	893	1355 (2020)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
101.	Yellow-legged Gull	1	1	0	0	1	0	0	0	0	0	3	0.3	0	1 (2017)
102.	Great Black-backed Gull	302	305	324	624	174	102	158	41	98	12	2140	214	123	624 (2020)
103.	Glaucous Gull	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2021)
104.	Lesser Black-backed Gull	1305	2429	3114	3348	578	574	3021	708	1207	60	16344	1634	1315	3348 (2020)
105.	Iceland Gull	0	1	0	0	0	2	1	0	0	0	4	0.4	0	2 (2022)
106.	Long-tailed Skua	1	1	1	8	3	4	7	3	5	0	33	3.3	0	8 (2020)
107.	skua sp.	24	15	30	12	35	25	21	10	16	0	188	19	1	35 (2021)
108.	Arctic Skua	63	31	109	16	121	67	125	13	88	0	633	63	5	125 (2023)
109.	S. parasiticus / pomarinus	0	1	0	0	0	0	0	1	0	0	2	0.2	0	1 (2018)
110.	Pomarine Skua	19	17	20	3	8	6	5	0	3	0	81	8.1	0	20 (2019)
111.	Great Skua	67	31	30	10	4	5	4	6	10	0	167	17	0	67 (2017)
112.	Puffin	2	1	0	0	1	0	0	1	0	1	6	0.6	0	2 (2017)
113.	Razorbill	3	8	22	84	14	2	373	2	1	72	581	58	83	373 (2023)
114.	Razorbill/Guillemot	341	2651	6065	3141	5048	12477	2627	241	90	4089	36770	3677	95	12477 (2022)
115.	Little Auk	1	1	4	0	0	4	1	0	22	0	33	3.3	3	22 (2025)
116.	Guillemot	50	1562	1275	1333	532	2255	64	56	22	118	7267	727	94	2255 (2022)
117.	Red-throated Diver	231	7066	5546	3933	4417	3099	2504	690	492	453	28431	2843	85	7066 (2018)
118.	Black-throated Diver	7	6	4	6	9	6	11	2	1	1	53	5.3	2	11 (2023)
119.	Great Northern Diver	1	3	3	0	0	2	3	0	0	0	12	1.2	0	3 (2018)
120.	diver sp.	24	34	4	10	33	17	9	12	9	1	153	15	0	34 (2018)
121.	Storm Petrel	0	0	0	0	1	0	1	0	0	0	2	0.2	0	1 (2021)
122.	storm-petrel sp.	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2023)
123.	Leach's Petrel	30	40	4	2	3	3	2	0	14	0	98	9.8	0	40 (2018)
124.	Fulmar	2	10	3	3	62	4	0	18	0	0	102	10	0	62 (2021)
125.	Sooty Shearwater	17	13	3	10	15	29	22	6	85	0	200	20	0	85 (2025)
126.	Manx Shearwater	25	19	6	2	1	0	10	2	76	0	141	14	0	76 (2025)
127.	Balearic Shearwater	1	0	1	0	1	0	1	0	1	0	5	0.5	0	1 (2017)
128.	shearwater sp.	1	4	1	0	2	0	3	0	2	0	13	1.3	0	4 (2018)
129.	Gannet	539	525	583	537	603	825	5072	365	1282	754	11085	1109	68	5072 (2023)
130.	Cormorant	3246	4006	9191	4590	4534	4508	3490	1682	2889	613	38749	3875	709	9191 (2019)
131.	Shag	0	0	1	0	0	0	0	0	0	0	1	0.1	0	1 (2019)
132.	Spoonbill	23	31	2	66	93	55	10	1	113	0	394	39	0	113 (2025)
133.	Little Egret	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2020)
134.	Great White Egret	0	1	0	0	3	9	0	0	2	0	15	1.5	0	9 (2022)
135.	Grey Heron	2	1	17	38	18	18	20	35	17	0	166	17	5	38 (2020)
136.	Purple Heron	0	0	3	0	0	5	0	0	0	0	8	0.8	0	5 (2022)
137.	Osprey	2	0	0	0	0	1	0	0	1	0	4	0.4	0	2 (2017)
138.	Sparrowhawk	7	2	1	1	1	1	2	1	1	0	17	1.7	0	7 (2017)
139.	Marsh Harrier	1	0	0	13	2	2	1	1	1	0	21	2.1	0	13 (2020)
140.	Hen Harrier	1	1	1	2	3	0	2	0	0	0	10	1	0	3 (2021)
141.	Red Kite	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
142.	White-tailed Eagle	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2021)
143.	Common Buzzard	0	0	0	3	2	0	0	0	0	0	5	0.5	0	3 (2020)
144.	Short-eared Owl	0	0	1	0	0	0	1	0	0	0	2	0.2	0	1 (2019)
145.	Kingfisher	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2020)
146.	Great Spotted Woodpecker	1	0	0	0	0	1	1	0	0	0	3	0.3	0	1 (2017)
147.	Kestrel	8	1	7	8	2	0	1	1	1	0	29	2.9	1	8 (2017)
148.	Merlin	5	2	3	8	3	3	5	1	0	0	30	3	0	8 (2020)
149.	Hobby	2	1	0	0	0	0	7	0	3	0	13	1.3	0	7 (2023)
150.	Peregrine	9	2	9	2	3	3	4	0	5	1	38	3.8	1	9 (2017)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
151.	Rose-ringed Parakeet	0	4	0	0	0	0	0	0	0	0	4	0.4	0	4 (2018)
152.	Jay	0	0	18	0	0	0	0	0	0	0	18	1.8	0	18 (2019)
153.	Magpie	1	0	0	0	0	6	0	0	0	0	7	0.7	0	6 (2022)
154.	Jackdaw	0	0	100	10	0	202	0	0	8	3	323	32	18	202 (2022)
155.	Rook	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2020)
156.	Carrion Crow	0	0	0	1	0	1	0	1	2	0	5	0.5	2	2 (2025)
157.	Blue Tit	0	0	0	0	0	14	0	0	86	0	100	10	0	86 (2025)
158.	Great Tit	0	0	0	0	0	3	0	0	0	0	3	0.3	0	3 (2022)
159.	Wood Lark	0	0	2	1	2	0	8	0	1	0	14	1.4	0	8 (2023)
160.	Skylark	215	10	26	133	96	8	79	15	23	5	610	61	0	215 (2017)
161.	Shore Lark	11	0	1	2	6	0	0	0	0	0	20	2	0	11 (2017)
162.	Sand Martin	3	0	1	31	12	5	0	2	3	0	57	5.7	0	31 (2020)
163.	Swallow	106	39	82	165	89	174	30	12	75	0	772	77	21	174 (2022)
164.	House Martin	18	3	45	4	15	1	2	0	3	0	91	9.1	0	45 (2019)
165.	Chiffchaff/Willow Warbler	0	0	0	0	0	1	0	0	0	0	1	0.1	0	1 (2022)
166.	Starling	75921	997	8546	44706	6999	8800	88052	186	49190	7	283404	28340	91	88052 (2023)
167.	Song Thrush	1	0	36	4	5	10	6	0	0	0	62	6.2	0	36 (2019)
168.	Mistle Thrush	0	0	0	0	0	0	2	0	0	0	2	0.2	0	2 (2023)
169.	Redwing	504	1	11	2	255	0	6	0	1	0	780	78	0	504 (2017)
170.	Blackbird	3	0	1	0	2	4	1	0	0	0	11	1.1	0	4 (2022)
171.	Fieldfare	1521	0	1	141	45	0	29	0	0	0	1737	174	0	1521 (2017)
172.	Black Redstart	0	0	0	0	0	0	0	0	2	0	2	0.2	0	2 (2025)
173.	Whinchat	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2024)
174.	Stonechat	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2024)
175.	Wheatear	2	0	0	7	0	1	1	1	2	0	14	1.4	0	7 (2020)
176.	Tree Sparrow	0	0	1	0	0	0	1	0	0	0	2	0.2	0	1 (2019)
177.	Dunnock	0	0	0	0	0	0	5	0	0	0	5	0.5	0	5 (2023)
178.	Blue-headed Wagtail	0	1	6	76	0	4	1	2	2	0	92	9.2	0	76 (2020)
179.	Yellow Wagtail (flavissima)	0	0	0	1	0	1	0	0	0	0	2	0.2	0	1 (2020)
180.	Grey-headed Wagtail	0	0	0	1	0	0	0	0	0	0	1	0.1	0	1 (2020)
181.	Yellow wagtail sp.	4	6	54	15	53	69	13	6	15	0	235	24	0	69 (2022)
182.	Grey Wagtail	8	2	45	18	7	4	37	3	16	0	140	14	0	45 (2019)
183.	White Wagtail	24	34	20	19	11	19	7	3	5	4	146	15	4	34 (2018)
184.	alba wagtail sp.	8	1	77	38	13	29	58	11	36	9	280	28	1	77 (2019)
185.	Pied Wagtail	1	0	0	0	0	0	0	1	0	0	2	0.2	0	1 (2017)
186.	Richard's Pipit	1	0	1	0	0	0	0	0	0	0	2	0.2	0	1 (2017)
187.	Meadow Pipit	533	245	1290	551	416	647	2519	389	656	9	7255	726	46	2519 (2023)
188.	Tree Pipit	0	0	4	1	3	3	2	0	1	0	14	1.4	0	4 (2019)
189.	Rock Pipit	26	3	8	3	10	4	4	0	1	0	59	5.9	3	26 (2017)
190.	Rock Pipit/Water Pipit	0	0	2	2	0	0	0	1	0	0	5	0.5	0	2 (2019)
191.	Chaffinch	819	19	2565	6065	6	2143	8245	0	5382	0	25244	2524	0	8245 (2023)
192.	Brambling	31	0	6	14	0	3	15	0	17	0	86	8.6	0	31 (2017)
193.	Greenfinch	12	5	12	16	0	4	21	0	3	1	74	7.4	0	21 (2023)
194.	Twite	0	0	0	0	0	0	1	0	0	0	1	0.1	0	1 (2023)
195.	Linnet	37	4	41	53	46	27	136	7	2	2	355	36	2	136 (2023)
196.	Mealy Redpoll	0	30	0	0	0	0	1	0	0	0	31	3.1	0	30 (2018)
197.	Redpoll	1	1	1	1	1	0	15	0	1	0	21	2.1	0	15 (2023)
198.	Crossbill	1	0	5	8	0	0	12	0	2	0	28	2.8	0	12 (2023)
199.	Goldfinch	20	14	1	50	5	1	16	0	0	2	109	11	0	50 (2020)
200.	Siskin	1	11	15614	265	1	320	2862	1	90	3	19168	1917	0	15614 (2019)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
201.	Lapland Bunting	0	0	1	1	1	0	1	0	0	0	4	0.4	0	1 (2019)
202.	Snow Bunting	6	0	1	4	3	1	2	0	0	0	17	1.7	5	6 (2017)
203.	Yellowhammer	4	0	3	0	0	0	3	0	0	0	10	1	0	4 (2017)
204.	Reed Bunting	1	2	13	17	0	10	29	0	5	0	77	7.7	0	29 (2023)
205.	bunting sp.	0	2	0	0	0	0	0	0	0	0	2	0.2	0	2 (2018)
206.	passerine sp.	0	1	0	0	0	0	0	0	0	0	1	0.1	0	1 (2018)
	Other species
1.	Harbour Porpoise	11	35	70	59	31	26	33	9	7	3	284	28	2	70 (2019)
2.	dolphin sp.	0	0	0	0	1	0	0	0	0	0	1	0.1	0	1 (2021)
3.	Grey seal	1	0	0	1	1	3	0	0	0	0	6	0.6	0	3 (2022)
4.	Common Seal	2	0	1	0	1	0	1	0	1	0	6	0.6	0	2 (2017)
5.	Common / Grey seal	0	0	0	0	1	0	1	0	0	0	2	0.2	0	1 (2021)
6.	Common Noctule	0	0	0	0	0	0	0	1	0	0	1	0.1	0	1 (2024)
	Species	2017	2018	2019	2020	2021	2022	2023	2024	2025	2026	Totals	Average	Present	Year Maximum
	Totals	108697	38914	84311	125706	81497	65047	160333	18651	89616	8165	780937	78094	10774
	Observation hours	182:43	145:16	249:05	195:57	178:22	167:07	159:39	74:15	147:40	11:35	1,511:39	151:10

Trektellen

Totals Katwijk - Savoy (zeetrek) 2017 - 2026