A total of 19 hummingbirds (four AHY
males, four AHY
females, 10 HY/SY males and one HY female) were re-encountered at least once during the same winter, a minimum of 3 weeks apart, for a residency rate of 26.
2002) surmised that calculations of adjusted mass may therefore lead to interpreting HY individuals of a mass similar to AHY
individuals as being in better relative condition.
Reddish feathers from six of nine birds, mostly HY, but also an AHY
, sampled at MBO bad detectable amounts of the pigment, including the two reddest individuals (band #s 1951-51453 and 195151463) (Fig.
We extrapolated to the total population and estimated that 508 chicks on the island at the time had wing deformities, including 456 HYs and 52 AHYs
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Three radio-marked birds died during the study; two (1 AHY
and 1 HY) appeared to have been preyed upon by raptors.
We classified as passage migrants all AHY
kingbirds captured in September or October with lipid scores of 6 or higher, that were not re-observed after being color banded, and which had no incubation patch or cloacal protuberance (to exclude the possibility they were breeding at the study site).
Age codes include HY (hatching year), indicating a bird in the calendar year of its hatching; SY (second year), indicating a bird in its second calendar year (HY/SY indicates a bird in its first plumage cycle, being HY until 31 Dec and SY after 1 Jan); TY (third year), indicating a bird in its third calendar year; AHY
(after-hatching year), indicating a bird in at least its second calendar year; ASY (after-second year), indicating a bird in at least its third calendar year; ATY (after-third year), indicating a bird in at least its fourth calendar year; and U (unknown), indicating a bird that may or may not be in the calendar year of birth.
refers to individuals that were hatched before the previous breeding season.
, Stewart AWS, Harrison J, Camargo C, Black PN, Mitchell EA.
Upon capture, we aged (adult = AHY
[after hatch year]/ASY [after second year] and juvenile = HY [hatch year]/SY [second year]; after Slack  and Pyle ), photographed, fitted a permanent U.
Demographic information about 10 avian hosts infested with Ixodes scapularis ticks in southwestern suburban Chicago, Illinois, USA, 2005-2010 * Bird Date of capture Age Site, category American robin 2007 Jul 18 AHY
1, residential American robin 2009 Aug 18 HY PL, green space American robin 2010 Jun 22 AHY
PHN, green space American robin 2010 Jul 13 AHY
PL, green space American robin 2010 Jul 26 HY PL, green space Blue jay 2009 Jun 15 AHY
PHN, green space Blue jay 2009 Jun 15 AHY
PHN, green space Gray-cheeked thrush 2010 Sep 16 HY PHN, green space Northern cardinal 2007 Aug 16 HY 13, residential Swainson's thrush 2006 May 23 AHY
WW, green space I.