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Totals Zaans Rietveld (Alphen aan den Rijn) 2021

	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
1.	Barnacle Goose	464	440	144	390	252	0	0	0	24	0	170	155	2039	383	1656	438 ( 1 Jan)	15	27	1 Jan	22 Dec
2.	Greylag Goose	136	45	0	0	0	0	0	40	22	93	66	22	424	354	70	72 ( 1 Jan)	11	19	1 Jan	31 Dec
3.	Pink-footed Goose	17	0	0	0	0	0	0	0	0	4	0	0	21	4	17	17 ( 3 Jan)	1	2	3 Jan	17 Oct
4.	Tundra Bean Goose	58	0	0	0	0	0	0	0	0	8	8	15	89	83	6	58 ( 1 Jan)	3	5	1 Jan	7 Dec
5.	Eurasian White-fronted Goose	2166	1138	62	0	0	0	0	0	48	133	325	750	4622	3218	1404	590 ( 1 Jan)	39	70	1 Jan	31 Dec
6.	Bewick's Swan	0	5	0	0	0	0	0	0	0	0	0	0	5	0	5	5 ( 8 Feb)	1	1	8 Feb	8 Feb
7.	Wigeon	0	65	0	0	0	0	0	0	0	0	0	0	65	0	65	65 (20 Feb)	1	1	20 Feb	20 Feb
8.	Mallard	0	0	0	0	0	0	0	0	0	0	3	0	3	3	0	3 (16 Nov)	1	1	16 Nov	16 Nov
9.	Swift	0	0	0	44	61	0	0	0	0	0	0	0	105	0	105	60 ( 6 May)	4	7	23 Apr	6 May
10.	Stock Dove	0	0	0	0	0	0	0	0	0	55	16	0	71	71	0	27 (24 Oct)	3	6	5 Oct	16 Nov
11.	Woodpigeon	0	0	0	0	0	0	0	0	6	501	26	0	533	533	0	240 (23 Oct)	6	10	21 Sep	16 Nov
12.	Lapwing	25	387	20	0	0	0	0	0	0	160	194	803	1589	1182	407	219 (11 Dec)	16	29	8 Jan	31 Dec
13.	Golden Plover	0	23	0	0	0	0	0	2	1	22	0	0	48	46	2	23 ( 6 Feb)	4	7	6 Feb	17 Oct
14.	Ringed Plover	0	1	1	0	8	0	0	1	7	0	0	0	18	10	8	7 (14 May)	4	8	25 Feb	28 Sep
15.	Whimbrel	0	0	0	73	3	0	12	5	0	0	0	0	93	16	77	42 (28 Apr)	6	11	8 Apr	6 Aug
16.	Curlew	0	0	55	0	0	0	0	0	65	0	0	9	129	11	118	48 (18 Mar)	3	6	7 Mar	22 Dec
17.	Black-tailed Godwit	0	32	21	0	0	0	0	0	0	0	0	0	53	0	53	29 (21 Feb)	2	4	20 Feb	5 Mar
18.	Dunlin	0	3	0	0	0	0	0	0	0	2	0	0	5	2	3	3 (26 Feb)	1	2	26 Feb	17 Oct
19.	Snipe	0	0	0	2	0	0	8	0	1	0	0	0	11	9	2	8 (21 Jul)	2	3	27 Apr	21 Sep
20.	Green Sandpiper	0	0	0	12	0	0	0	0	0	2	0	0	14	2	12	12 (24 Apr)	1	2	24 Apr	24 Oct
21.	Spotted Redshank	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (15 Sep)	1	1	15 Sep	15 Sep
22.	Greenshank	0	0	0	1	1	0	0	6	0	0	0	0	8	5	3	5 (18 Aug)	2	4	23 Apr	28 Aug
23.	Black-headed Gull	0	117	190	0	0	0	0	11	0	21	0	0	339	32	307	110 ( 9 Mar)	4	8	26 Feb	17 Oct
24.	Common Gull	0	38	16	0	0	0	0	0	0	6	0	0	60	6	54	38 (28 Feb)	2	4	28 Feb	17 Oct
25.	Caspian Gull	0	0	0	0	0	0	0	0	10	0	0	0	10	10	0	10 (23 Sep)	1	1	23 Sep	23 Sep
26.	Lesser Black-backed Gull	0	0	0	0	0	0	0	0	6	0	0	0	6	6	0	6 (18 Sep)	1	1	18 Sep	18 Sep
27.	Black Tern	0	0	0	0	0	0	4	0	0	0	0	0	4	0	4	4 (14 Jul)	1	1	14 Jul	14 Jul
28.	White Stork	0	1	0	0	0	0	0	0	23	4	0	0	28	18	10	14 (13 Sep)	2	4	26 Feb	17 Oct
29.	Cormorant	0	19	17	29	0	0	0	0	257	189	154	0	665	620	45	155 (21 Sep)	10	18	9 Feb	21 Nov
30.	Spoonbill	0	0	0	0	2	0	0	3	5	0	0	0	10	3	7	4 ( 4 Sep)	2	4	30 May	21 Sep
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
31.	Night Heron	0	0	0	0	0	0	0	1	0	0	0	0	1	1	0	1 (23 Aug)	1	1	23 Aug	23 Aug
32.	Grey Heron	0	0	0	1	0	1	0	3	0	0	1	0	6	4	2	3 (23 Aug)	2	4	23 Apr	21 Nov
33.	Purple Heron	0	0	0	0	1	2	0	0	1	0	0	0	4	1	3	2 ( 4 Jun)	2	3	14 May	15 Sep
34.	Great White Egret	0	0	1	0	0	5	0	1	10	8	0	0	25	20	5	6 (17 Oct)	6	10	26 Mar	17 Oct
35.	Little Egret	0	0	0	0	0	0	0	1	0	0	0	0	1	0	1	1 (28 Aug)	1	1	28 Aug	28 Aug
36.	Honey Buzzard	0	0	0	0	0	0	0	1	0	0	0	0	1	1	0	1 (14 Aug)	1	1	14 Aug	14 Aug
37.	Sparrowhawk	0	0	0	1	0	0	0	0	0	1	0	0	2	1	1	1 (14 Apr)	1	2	14 Apr	17 Oct
38.	Marsh Harrier	0	0	1	2	1	0	0	0	2	0	0	0	6	2	4	2 (27 Sep)	3	5	25 Mar	27 Sep
39.	White-tailed Eagle	0	0	0	1	0	0	0	0	0	0	0	0	1	0	1	1 (16 Apr)	1	1	16 Apr	16 Apr
40.	Common Buzzard	0	0	1	1	0	0	0	0	0	1	0	0	3	1	2	1 ( 5 Mar)	2	3	5 Mar	5 Oct
41.	Short-eared Owl	0	0	0	0	0	1	0	0	0	0	0	0	1	0	1	1 ( 2 Jun)	1	1	2 Jun	2 Jun
42.	Hobby	0	0	0	0	0	0	0	0	1	0	0	0	1	1	0	1 (10 Sep)	1	1	10 Sep	10 Sep
43.	Cockatiel	0	1	0	0	0	0	0	0	0	0	0	0	1	0	1	1 (28 Feb)	1	1	28 Feb	28 Feb
44.	Jay	0	0	0	0	0	0	0	0	10	28	0	0	38	35	3	18 (17 Oct)	4	7	19 Sep	17 Oct
45.	Jackdaw	0	0	0	0	0	0	0	0	13	206	0	0	219	219	0	146 (24 Oct)	3	5	21 Sep	29 Oct
46.	Blue Tit	0	0	0	0	0	0	0	0	0	39	0	0	39	39	0	24 (17 Oct)	2	3	17 Oct	29 Oct
47.	Great Tit	0	0	0	0	0	0	0	0	0	8	0	0	8	8	0	8 (17 Oct)	1	1	17 Oct	17 Oct
48.	Wood Lark	0	0	0	0	0	0	0	0	0	1	0	0	1	1	0	1 (24 Oct)	1	1	24 Oct	24 Oct
49.	Skylark	0	22	0	0	0	0	0	0	1	308	22	0	353	334	19	133 (29 Oct)	13	24	6 Feb	23 Nov
50.	Swallow	0	0	0	2	0	0	0	0	27	8	0	0	37	35	2	13 (21 Sep)	7	13	1 Apr	17 Oct
51.	Yellow-browed Warbler	0	0	0	0	0	0	0	0	0	1	0	0	1	1	0	1 (17 Oct)	1	1	17 Oct	17 Oct
52.	Starling	0	1271	530	0	0	0	0	0	179	3265	1012	0	6257	4456	1801	1129 (17 Oct)	10	18	20 Feb	16 Nov
53.	Song Thrush	0	0	0	0	0	0	0	0	0	46	0	0	46	46	0	16 (17 Oct)	3	5	2 Oct	29 Oct
54.	Mistle Thrush	0	0	0	0	0	0	0	0	0	7	0	0	7	7	0	4 (29 Oct)	2	3	17 Oct	29 Oct
55.	Redwing	3	6	0	0	0	0	0	0	0	1845	30	0	1884	1870	14	1271 (29 Oct)	6	11	3 Jan	15 Nov
56.	Blackbird	0	0	0	0	0	0	0	0	0	6	2	0	8	6	2	4 (29 Oct)	2	3	24 Oct	15 Nov
57.	Fieldfare	0	0	0	0	17	0	0	0	0	44	68	0	129	94	35	50 ( 8 Nov)	4	7	3 May	15 Nov
58.	Tree Sparrow	0	0	0	0	0	0	0	0	0	24	0	0	24	24	0	15 (24 Oct)	2	3	1 Oct	24 Oct
59.	Dunnock	0	0	0	0	0	0	0	0	2	0	0	0	2	2	0	2 (21 Sep)	1	1	21 Sep	21 Sep
60.	Blue-headed Wagtail	0	0	0	2	0	0	0	1	0	0	0	0	3	1	2	1 (27 Apr)	2	3	27 Apr	31 Aug
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
61.	Grey Wagtail	0	0	0	0	0	0	0	0	0	8	0	0	8	8	0	3 (24 Oct)	2	4	2 Oct	29 Oct
62.	White Wagtail	0	3	0	0	0	0	0	0	3	11	1	0	18	15	3	4 ( 2 Oct)	5	9	26 Feb	16 Nov
63.	Meadow Pipit	0	8	0	22	2	0	0	0	34	316	0	0	382	343	39	135 ( 2 Oct)	11	20	20 Feb	29 Oct
64.	Water Pipit	0	1	0	0	0	0	0	0	0	4	0	0	5	4	1	2 (17 Oct)	2	3	26 Feb	24 Oct
65.	Chaffinch	0	8	0	0	0	0	0	0	38	2904	68	0	3018	2978	40	1456 ( 5 Oct)	14	25	20 Feb	16 Nov
66.	Brambling	0	0	0	0	0	0	0	0	0	159	1	0	160	160	0	94 (17 Oct)	3	6	7 Oct	10 Nov
67.	Greenfinch	0	4	0	0	0	0	0	0	1	9	5	0	19	15	4	4 (20 Feb)	4	8	20 Feb	16 Nov
68.	Linnet	0	1	0	0	0	0	0	0	23	3	0	0	27	26	1	23 (21 Sep)	2	4	26 Feb	17 Oct
69.	redpoll sp.	0	0	0	0	0	0	0	0	0	3	0	0	3	3	0	3 (17 Oct)	1	1	17 Oct	17 Oct
70.	Siskin	0	0	0	0	0	0	0	0	0	128	10	0	138	123	15	58 (17 Oct)	4	7	2 Oct	15 Nov
71.	Reed Bunting	0	1	0	0	0	0	0	0	3	25	1	0	30	27	3	8 (29 Oct)	5	9	26 Feb	16 Nov
	Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Totals	S	N	Maximum	Presence (%)	Presence (days)	First	Last
	Totals	2869	3640	1059	583	348	9	24	76	824	10616	2183	1754	23985	17540	6445		100	178
	Observation hours	25:30	41:00	26:00	29:00	19:00	6:00	6:00	16:00	37:00	48:30	25:00	35:00	314:00

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Totals Zaans Rietveld (Alphen aan den Rijn) 2021