1985 Walter D Koenig 3 Melanerpes formicivorus Keep Out HNHR 23 April 1600. Nest check: 4 young (~2do) babies + 1 undeveloped egg. 3 May Today I began the experiment to see how/if adults adjust their feeding rates to the number of babies in the nest. Vas and I came up early (615), set up blinds here and at Fanny Arnold, and then did nest watches - she here and me at Fanny Arnold. Here there was only the pair, as expected. I then did the following: ① Weighed the babies here. There were 2, both rather different in size. ② I left the bigger baby here and took the 2nd (the one with only 1 leg) ③ I took a baby from UA2's nest. ④ I added both these babies to the 3 they had at Fanny Arnold. All babies were weighed and transferred between 1000-1100, immediately following the watches. Hence: today is Control Day #1. Tomorrow is Experimental Day #2, in which KeepOut's brood has been reduced from 2 to 1 and Fanny Arnold's increased from 3 to 5. 4 May Experimental Day #2. Vas watched here again, 645-1000. 5 May Control Day #3. Vas watched; 2 babies added afterwards. 6 May Experimental Day #4. Unfortunately, The Arnold was completely socked in with fog this morning, at least when we arrived. It was also cold. Nonetheless, Vas watched again 7 May Control Day #5. Vas watched; Philip weighed w/ Lesola. 18 May Banded the babies as #1016-1017. The no-leg one is far behind and his leg is gone almost up to the hip, but he's hanging in there.