Townsend's Solitaire (Myadestes townsendi)

Bowen, Rhys

doi:10.2173/tbna.269.p

Cited by 2 publications

(3 citation statements)

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“…Post‐molt singing, as I here describe it for Wilson's Warblers, may be widespread in passerines and perhaps other taxa, and my observations suggest that it may be a reliable indicator that prebasic molt is complete. It should be noted, however, that post‐molt singing in passerines may not be the same as singing over extended times during non‐breeding seasons, which is reported for multiple passerine species, such as Zonotrichia sparrows (Chilton et al, 2020) and Townsend's Solitaires (Bowen, 2020). Post‐molt singing, as I found it occurring in Wilson's Warblers, appears to be brief, usually lasting no more than a week.…”

Section: Discussionmentioning

confidence: 98%

Late breeding season definitive prebasic molt in males, and late breeding season brood care by females, in central California Wilson’s warblers

Gilbert

2022

Ecology and Evolution

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I made observations of a central California population of Wilson's Warbler, Cardellina pusilla, after July 1 over 10 breeding seasons. I sighted males in definitive prebasic molt from July 4 (in 2007) to September 1 (in 1999). Most territorial males molted on their breeding territories, and individual molt lasted up to 46 days. Following prebasic molt, territorial males engaged in subdued “post‐molt singing,” which lasted about 7 days in some males, and which I first heard on August 13 (in 2004) and last heard on September 6 (in 1999). I sighted no female in definitive prebasic molt, or in fresh basic plumage, during the study. Of 13 females sighted ≥ July 21, 11 were in late breeding season uniparental brood care, and I could not rule out late brood care for the other two. Most, and possibly all, females not engaged in late season uniparental brood care apparently vacated their breeding territories before July 21. This departure was much earlier than for resident males, the last of which I sighted on September 10 (in 1999). Early‐departing females presumably underwent prebasic molt after July 21 at locations not known. Remaining late‐nesting females must have molted much later than resident males and likely later than early‐departing females, and at locations unknown. I last sighted two uniparental brood‐tending females, still in worn plumage, on August 26 and 29, respectively. Two unique findings of this study are a male/female difference in location of prebasic molt, and a likely dichotomy of prebasic molt timing between females leaving their breeding territories early and those remaining in uniparental brood care. Another finding, post‐molt singing in most and possible all territorial males, is a largely unrecognized behavior, but one previously reported in several passerine species. Post‐molt singing may reliably indicate completion of prebasic molt.

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Section: Discussionmentioning

confidence: 98%

Late breeding season definitive prebasic molt in males, and late breeding season brood care by females, in central California Wilson’s warblers

Gilbert

2022

Ecology and Evolution

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“…In a general review, Bowen (1997) stated that Townsend's solitaires prefer coniferous forests including lodgepole pine, and particularly thinned stands or selectively logged stands with a sparse shrub layer and little vegetative ground cover. In Douglas-fir forests in the central interior of British Columbia, Townsend's solitaires were common particularly in stands where there was heavy removal of trees (Waterhouse and Dawson 1998).…”

Section: Townsend's Solitairementioning

confidence: 99%

“…This may be due to the more open stand structure and greater abundance of common juniper in the sbps zone. Bowen (1997) cites several studies that mention juniper berries as an important forage for solitaires.…”

Section: Townsend's Solitairementioning

confidence: 99%

Forest bird response to partial cutting in lodgepole pine forests on caribou winter range in west-central British Columbia

Waterhouse¹,

Armleder²

2007

JEM

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Breeding birds were surveyed 1 year pre-harvest (1995) and 4 years post-harvest (1996–2001) to measure the response to partial cutting in old lodgepole pine (Pinus contorta Dougl.) forests on the Chilcotin Plateau of British Columbia. The irregular group shelterwood and group selection systems recommended to manage northern caribou (Rangifer tarandus caribou Gmelin) habitat did not negatively affect the breeding bird community. In some years within the post-harvest period, dark-eyed juncos (Junco hyemalis L.), red crossbills (Loxia curvirostra L.), yellow-rumped warblers (Dendroica coronata L.), and gray jays (Perisoreus canadensis L.) showed significant (α = 0.05) increases in use of the partial-cutting treatments compared with the no-harvest treatment. No species decreased significantly in any of the partial-cutting treatments. The increased observations of mostly common species resulted in significantly (α = 0.05) higher species richness, and increased frequency of observations for the bird community in some years in the partial cuts. Partial cutting of caribou habitat will maintain bird communities typical of mature to older lodgepole pine forests.

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Townsend's Solitaire (Myadestes townsendi)

Cited by 2 publications

References 0 publications

Late breeding season definitive prebasic molt in males, and late breeding season brood care by females, in central California Wilson’s warblers

Late breeding season definitive prebasic molt in males, and late breeding season brood care by females, in central California Wilson’s warblers

Forest bird response to partial cutting in lodgepole pine forests on caribou winter range in west-central British Columbia

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