Song Dialects in Several Populations of Mountain White-Crowned Sparrows (Zonotrichia leucophrys oriantha) in the Sierra Nevada

The Condor ◽  
1975 ◽  
Vol 77 (2) ◽  
pp. 145-153 ◽  
Author(s):  
Jorge E. Orejuela ◽  
Martin L. Morton
Keyword(s):  
Sierra Nevada ◽  
Zonotrichia Leucophrys ◽  
Song Dialects ◽  
Zonotrichia Leucophrys Oriantha

scholarly journals Facultative Altitudinal Movements by Mountain White-Crowned Sparrows (Zonotrichia Leucophrys Oriantha) in the Sierra Nevada

The Auk ◽  
2004 ◽  
Vol 121 (4) ◽  
pp. 1269-1281 ◽  
Author(s):  
Thomas P. Hahn ◽  
Keith W. Sockman ◽  
Creagh W. Breuner ◽  
Martin L. Morton
Keyword(s):  
Sierra Nevada ◽  
Egg Laying ◽  
Movement Behavior ◽  
Zonotrichia Leucophrys ◽  
Lower Elevation ◽  
Early Afternoon ◽  
Adverse Weather ◽  
Breeding Grounds ◽  
Spring Arrival ◽  
Zonotrichia Leucophrys Oriantha

Abstract Mountain White-crowned Sparrows (Zonotrichia leucophrys oriantha) winter in Mexico and often arrive in the vicinity of their breeding grounds in the Sierra Nevada well before nesting is possible. Arrival at Tioga Pass, California (elevation 3,030 m), usually occurs in early May, but residual winter snow and adverse weather can delay nesting for weeks. We used radiotelemetry to determine whether prebreeding Mountain White-crowned Sparrows engaged in weather-related altitudinal movements during the waiting period between the end of spring migration and onset of breeding during 1995–2001, with a range of residual winter snowpacks. Interannual variation in arrival date and onset of egg laying was 18 and 41 days, respectively. We tracked females for two years and males for all seven years. During spring snowstorms (which occurred in four years), radiomarked individuals moved to lower elevation sites, where they often remained for several days. Departing birds left Tioga Pass by early afternoon and returned early in the morning after storms. More frequent storms during tracking increased the likelihood of facultative altitudinal movements, but heavier residual winter snowpack did not. Warm days increased the likelihood of birds returning to Tioga Pass from low elevation. This study demonstrates that facultative altitudinal movement behavior can be a common feature of spring arrival biology in montane-breeding birds.

scholarly journals Facultative Altitudinal Movements by Mountain White-Crowned Sparrows (Zonotrichia leucophrys oriantha) in the Sierra Nevada

The Auk ◽  
2004 ◽  
Vol 121 (4) ◽  
pp. 1269-1281 ◽  
Author(s):  
Thomas P. Hahn ◽  
Keith W. Sockman ◽  
Martin L. Morton
Keyword(s):  
Sierra Nevada ◽  
Zonotrichia Leucophrys ◽  
Zonotrichia Leucophrys Oriantha

The Biology of Immature Mountain White-Crowned Sparrows (Zonotrichia leucophrys oriantha) on the Breeding Ground

The Condor ◽  
1972 ◽  
Vol 74 (4) ◽  
pp. 423-430 ◽  
Author(s):  
Martin L. Morton ◽  
Jorge E. Orejuela ◽  
Susan M. Budd
Keyword(s):  
Breeding Ground ◽  
Zonotrichia Leucophrys ◽  
Zonotrichia Leucophrys Oriantha

Dialect Discrimination by White-Crowned Sparrows: Reactions to Near and Distant Dialects

The Auk ◽  
1983 ◽  
Vol 100 (2) ◽  
pp. 452-460 ◽  
Author(s):  
Diana F. Tomback ◽  
Daniel B. Thompson ◽  
Myron Charles Baker
Keyword(s):  
Playback Experiments ◽  
Zonotrichia Leucophrys ◽  
Marin County ◽  
Song Dialects ◽  
Song Playback

Abstract In Marin County, California, the dialect populations of Zonotrichia leucophrys nuttalli are contiguous, and there is little dialect mixing. The possible importance of male-male interactions in preventing dialect mixing was tested with song-playback experiments. Males of the Limantour dialect were presented the Limantour dialect, Drake or Buzzy dialects (neighboring), or Clear dialect (distant). From previous work, we predicted that Limantour males would respond with equal or more aggression to songs of immediately neighboring dialects in comparison with their own dialect but would respond at lower levels to a distant dialect. Instead, we found that Limantour males sang significantly more songs in response to the Limantour dialect than to either neighboring or distant dialects, although the response decreased with distance, as expected. These results led us to hypothesize that responses to an alien dialect may be influenced by (1) opportunity to habituate to the alien dialect, (2) recency of divergence of the two dialects, (3) recency of contact of the two dialects, and (4) sounds common in aggressive vocalizations in other contexts being also present in some song dialects but not others.

Song Dialects and Gene Flow in the White-Crowned Sparrow, Zonotrichia leucophrys nuttalli

Evolution ◽  
1985 ◽  
Vol 39 (3) ◽  
pp. 687 ◽  
Author(s):  
David J. Hafner ◽  
Karen E. Petersen
Keyword(s):  
Gene Flow ◽  
Zonotrichia Leucophrys ◽  
Song Dialects
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