Nest Box																														
			1974	1975	1976	1977	1978	1979	1980	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998		1999	2000
Mean First Egg Dates - May																														
																														
	Blue Tit		3.1	9.8		14.6		22.8	2.3	7.1	2.8	12.2	11.0	11.2	14.0	-1.2	7.2	7.8	-0.1	12.2	1.4	0.2	4.4	7.3	9.4	-1.0	11.8			-1.3
	Great Tit		9.5	13.4		14.2		14.8	3.3	12.7	6.2	15.1	17.2	10.8	19.3	-1.0	7.7	7.9	1.7	11.3	-0.5	0.5	6.3	7.8	12.9	2.0	4.0			0.7
	Pied Flycatcher		19.5	20.0	19.4	21.1	22.8	23.0	17.4	18.7	17.3	18.7	17.2	21.2	19.7	10.9	14.5	16.3	12.6	25.1	9.9	12.0	15.9	12.7	22.3	8.0	20.0			10.5