Black-chinned Hummingbird dispersal from breeding sites in the Edward's Plateau, Texas 1996-2002
Black-chinned Hummingbird dispersal from breeding sites in the Edward's Plateau, Texas 1996 - 2002.
BRENT ORTEGO, Texas Parks & Wild. Dept, Victoria, TX, ARTIE RICHARD and HANNA RICHARD, Ingram, TX.
Attempts were made to band Black-chinned Hummingbirds (BCHU) twice per day, every day they were available from 1995 thru 2002 in the Edward's Plateau, TX. 11,933 BCHU were banded and 669 recaptured. The effort produced a network of eight banding sites surrounding the home, Ingram, Kerr Co., of Master Bander Hanna Richard where 40% of the birds were banded. Banding sites were positioned 3 and 13 mi NW, 36 mi SW, 5 mi S, 27 mi SE, 3 mi E, and 7 and 11 mi NE. Data were examined to determine site fidelity and survival by age and sex. Recaptures during years following initial banding were highest for HY-M at 7.22%, followed by AHY-F 6.35%, AHY-M 5.21 % and HY-F 3.40%. Age/Sex most likely to be captured at sites different from the one of original banding were HY-M 0.90%, AHY-M 0.64%, AHY-F 0.30% and HY-F 0.11%. Since likelihood of dispersing was probably related to total survival of age/sex classes, ratios of recaptured birds to dispersing birds were developed. One of every eight males recaptured, both AHY and HY, were caught at a different hummingbird banding site. Only one of 21 AHY-F and one of 31 HY-F were recaptured at different banding sites. Thus, males were three times more likely to disperse than females. This likelihood to disperse (site fidelity) needs to be factored into band-return data when analyzing survival.
| AHY-M | AHY-F | HY-M | HY-F | Total | |
|---|---|---|---|---|---|
| Banded | 2692 | 3107 | 2794 | 3340 | 11,933 |
| Recaptured | 171 | 162 | 95 | 241 | 669 |
| Moved | 8 | 20 | 3 | 30 | 61 |
| % Moved | 0.30% | 0.64% | 0.11 % | 0.90% | 0.51% |
| % Recaptured | 6.35% | 5.21% | 3.40% | 7.22% | 5.61% |
| Recaptured/Moved | 21 | 8 | 31 | 8 |
