1982 R.c. numme Melanecpes formicivorus Plaque (18 April) of this page, page 12. The 3 eggs have been marked, but E definitely need to measure them all soon. 19 April Late start here, but two more eggs laid today Also, it appears that mate guarding is breaking down and incubation is about to begin (if not already begun). ♂521 lingered in the hole at 0730 after ♀494 had left the nest area. Anyway, ♀496 laid before 0645, ♀494 laid between 0707 & 0725. 0800, I opened the hole, measured all the eggs and marked the new ones. ① 26.7 x 19.6 ♀494 (for sure) asymmetrical air cell 17 Apr ② 26.0 x 19.0 ♀496 (probably) 18 Apr ③ 26.9 x 20.4 ♀494 (probably) 18 April ④ 27.1 x 20.1 ♀494 (probably)(almost certain) 19 Apr ⑤ 26.7 x 19.0 ♀496 (almost certain) 19 April 20 April No watch today, but I check the hole at 1700. ♂ was incubating as I arrived, so Mate guarding has certainly ended here. Anyway, two new eggs marked & measured. ⑥ 26.6 x 18.9 (♀496 almost certainly) ⑦ 26.4 x 19.7 (♀494 almost certainly) This egg also had an asymmetrical air cell, which ♀494's first egg also had. Clutch may be complete here, but we shall see what happens tomorrow.