3 May 1981 1800 Pre nesting 1710 nobody ' ' ↓ 1740 core 3 sap tree | NI - both ββ follow 44T (5) 1745 " " " | NI - FTF (O) 1750 core 3 β561 β564 g | NI - MAF (O) 1755 ? 1700 ? 1705 core 3 β561, β562 β564 g | NI 1710 " " g NI 1715 core 3g I ββ561,562,564 NI g | 1720 all but β565 g NI 1725 " " NI 7 May 1981 1800 Egg-laying 1555 core 3 others g 1600 core 3 sap | others g 1605 core 3 β561g | β562 sap 1610 core 3g | β561 sap NI 1615 core 3g | NI 1620 core 3 β561 sridge area | 1625 nobody 1630 β561 g | core elsewhere 1635 core 3 β561 β565g | NI 1640 " " " | +others g | NI | 1645 " " " | NI | 1650 ? 1655 β561 g | β564 sap (core elsewhere) - 1735 core 3 sap NI 1740 " " " 1745 core 3 β565 β562 g 1750 " " " | g NI 1755 core 3 others g | I 1800 β561g | core 3 sridge 1805 core 3g NI 1810 ? 1815 ? 1820 β561, others g | core elsewhere - 1825 β561β564 g | 1830 core 3 sap | others g (β561,β564) - 1835 β561, others sap | core 3 elsewhere - 1840 core 3 nest area, others g 1845 ? 1850 core 3 sap 1865 1900 9193 F FTF MAF both δδ (15) 44T 44T 44T (O) δ476 δ347