SPRING MIGRATION AT TRING RESERVOIRS
Summer visitors - earliest arrival
	Average	2005	2004	2003	2002	2001	2000	1999	1998	Comments
Sand Martin	14-Mar	20-Mar	16-Mar	11-Mar	09-Mar	18-Mar	12-Mar	14-Mar	14-Mar
Swallow	29-Mar	27-Mar	17-Mar	29-Mar	31-Mar	23-Mar	01-Apr	02-Apr	11-Apr
Willow Warbler	02-Apr	27-Mar	04-Apr	02-Apr	27-Mar	07-Apr	07-Apr	02-Apr	08-Apr
House Martin	03-Apr	27-Mar	26-Mar	14-Apr	08-Apr	27-Mar	09-Apr	06-Apr
Common Tern	04-Apr	01-Apr	02-Apr	08-Apr	05-Apr	31-Mar	09-Apr	06-Apr	04-Apr
Sedge Warbler	08-Apr	10-Apr	14-Apr	04-Apr	07-Apr	06-Apr	16-Apr	05-Apr	05-Apr
Cuckoo	20-Apr	16-Apr	12-Apr	17-Apr	19-Apr	23-Apr	24-Apr	24-Apr	26-Apr
Reed Warbler	20-Apr	28-Apr	21-Apr	16-Apr	21-Apr	25-Apr	22-Apr	18-Apr	12-Apr
Swift	22-Apr	23-Apr	17-Apr	20-Apr	20-Apr	22-Apr	02-May	26-Apr	19-Apr
Whitethroat	22-Apr	19-Apr	17-Apr	21-Apr	20-Apr	23-Apr	03-May	26-Apr
Hobby	23-Apr	16-Apr	18-Apr	05-May	28-Apr	26-Apr	21-Apr	22-Apr	25-Apr
Lesser Whitethroat	25-Apr	22-Apr	27-Apr	20-Apr	22-Apr	06-May		24-Apr
Garden Warbler	29-Apr	01-May	02-May	18-Apr	05-May	27-Apr	30-Apr	28-Apr	04-May
Chiffchaff and Blackcap excluded due to confusion caused by overwintering birds.
Spring passage birds - duration
	Average	2005	2004	2003	2002	2001	2000	1999	1998	Comments
Yellow Wagtail	07-Apr	09-Apr	06-Apr	02-Apr	07-Apr	07-Apr	11-Apr	12-Apr	03-Apr	Especially in horse field
until	08-May	08-May	12-May	16-May	05-May	Stayed	05-May	05-May	11-May	above Startops car park
Wheatear	05-Apr	16-Mar	09-Apr	No	19-Apr	No	22-Mar	25-Apr
until	21-Apr	01-May	09-Apr	show	08-May	show	05-Apr	25-Apr
Common Sandpiper	17-Apr	21-Apr	10-Apr	19-Apr	10-Apr	24-Apr	19-Apr	06-Apr	27-Apr
until	14-May	30-Apr	23-May		18-May	16-May	14-May	01-May	31-May
Little Tern	22-Apr	01-May	No	No	No	24-Apr	11-Apr
until	06-May	01-May	show	show	show	12-May	05-May
Arctic Tern	20-Apr	23-Apr	18-Apr	08-Apr	16-Apr	18-Apr	03-May	22-Apr	26-Apr
until	02-May	04-May	03-May	08-May	14-May	21-Apr	05-May	26-Apr	01-May
Black Tern	01-May	12-May	30-Apr	16-Apr	09-May	11-May	26-Apr	02-May	29-Apr
until	16-May	15-May	16-May	21-Apr	18-May	23-May	27-May	20-May	22-May
Turtle Dove	14-May	15-May	23-May	26-May	01-May		04-Jun	21-May	13-Apr
until	24-May		23-May	26-May	21-May		04-Jun	21-May	18-May
Winter visitors - latest departure
	Average		2004	2003	2002	2001	2000	1999	1998	Comments
Smew	14-Feb	02-Apr	02-Mar	31-Dec	28-Mar	24-Feb	24-Jan		01-Jan
Goosander	28-Feb	23-Feb	02-Mar	27-Feb	12-Feb	28-Jan	09-Mar	23-Mar	19-Mar
Bittern	02-Mar	14-Feb	14-Mar	09-Mar	09-Mar	13-Feb	09-Mar	23-Apr	16-Jan
Fieldfare	15-Mar	16-Mar	04-Apr	10-Apr	24-Mar	28-Jan	05-Apr	25-Feb	08-Mar
Redwing	19-Mar	16-Mar	04-Apr	06-Apr	11-Apr	01-Feb	05-Apr	25-Feb
Goldeneye	07-Apr	02-Apr	13-Apr	01-Apr	04-Apr	08-Apr	16-Apr	30-Mar	19-Apr
Other ducks are not so clear cut
Unfortunately latest records for each species are fairly irregular