1986 Walter D Koenig Doubly-labelled Water Hastings Reservation 51A δ754 at Y. 18 April 1120 injected w/ 250μl H³O₁₈. Wt: 88.9gm good injection Blood taken: 1224 (wt:86.1g) Released: 1225 (No 2nd sample recovered) 22 April 52A ♀1207 at LA2. 1226 injected w/ 230μl H³O₁₈ Wt: 81.6q (good inj.) Blood taken: 1332 (wt: 79.9) Released: 1334 30 April 53A ♀675 at Y. Injected at 844 PST w/ 220μl H³O₁₈ Wt: 79.8g (good inj.) Blood taken: 852 PST (wt:77.8q) Caught in net at nest. 53B ♀675. Blood taken 914 PST (wt:80.9q) Caught feeding at nest. 1 May 54A ♀984. Injected at 1215 w/ 24μl (wt: ) wt: 78.8g. Blood taken 1321 PST wt: 78.1 (Plaque Helper) 21 May 55A ♀ Breeder. Western Bluebird at box 246 (box w/ helper, old babies). Injected w/ 75μl H³O₁₈ at 730 PDST (wt: 27.8); bled at 0826 (26.0) 30 May 55B ♀ Bled at 0842 (wt: 26.0g). (Box 246)