Table 1.

Results of GLMs of annual and individual variation in (a) spring arrival dates of 54 Icelandic black-tailed godwits (4–8 years between 1999 and 2012) and in relation to mean April (the main arrival month) temperatures (°C) in Iceland, and (b) laying dates for 15 pairs of godwits recorded in 2–3 years between 2001 and 2012 and in relation to mean June (the main nesting month) temperatures (°C) in south Iceland. (Significant effects are highlighted in italics.)

	d.f.	F	p	parameter (±s.e.)
(a)
year	1	2.69	0.102	−0.13 (±0.08)
individual	53	5.31	<0.001
error	229
temperature	1	1.76	0.186	0.23 (±0.17)
individual	53	6.44	<0.001
error	229
(b)
year	1	4.78	0.042	−2.55 (±1.17)
pair	14	1.31	0.289
error	18
temperature	1	1.76	0.018	−4.04 (±1.55)
pair	14	6.44	0.446
error	229