Table 2.

Pearson's r correlation calculated between time spent flying per day and daily heart rate (DHR), non-flight heart rate (NFHR) or NFHR including migrations at intra-individual level in 13 common eiders.

individual	DHR (excluding migrations)	NFHR (excluding migrations)	NFHR (including migrations)
BR	0.357	0.314	0.275
OO	0.588	0.546	0.327
OR	0.034	−0.010	−0.222
OY	−0.337	−0.452	−0.421
RB	−0.186	−0.232	−0.140
RR	−0.074	−0.147	−0.193
RW	0.351	0.170	−0.247
WB	−0.007	−0.145	−0.251
WO	−0.025	−0.071	−0.099
YB	−0.237	−0.301	−0.271
YR	−0.100	−0.274	−0.211
YW	0.099	0.052	0.029
YY	0.407	0.333	0.103