Pinyon Jay (Gymnorhinus cyanocephalus)

2020 ◽  
Author(s):  
Russell P. Balda
Keyword(s):  
Pinyon Jay

Seasonality of Mobbing Intensity in the Pinyon Jay

Ethology ◽  
2010 ◽  
Vol 71 (4) ◽  
pp. 333-339 ◽  
Author(s):  
Jack F. Cully ◽  
J. David Ligon
Keyword(s):  
Pinyon Jay

Long-term declines in the Pinyon Jay and management implications for piñon–juniper woodlands

2018 ◽  
pp. 190-197
Author(s):  
John D. Boone ◽  
Elisabeth Ammon ◽  
Kristine Johnson
Keyword(s):  
Management Implications ◽  
Pinyon Jay

Behavior at a Pinyon Jay Nest in Response to Predation

The Condor ◽  
1985 ◽  
Vol 87 (4) ◽  
pp. 559-561 ◽  
Author(s):  
John M. Marzluff
Keyword(s):  
Pinyon Jay

The Pinyon Jay: Behavioral Ecology of a Colonial and Cooperative Corvid

10.2307/5213 ◽  
1993 ◽  
Vol 62 (3) ◽  
pp. 596
Author(s):  
B.J. Hatchwell ◽  
John M. Marzluff ◽  
Russel P. Balda
Keyword(s):  
Behavioral Ecology ◽  
Pinyon Jay

Food, audience and sex effects on pinyon jay (Gymnorhinus cyanocephalus) communication

2005 ◽  
Vol 68 (1) ◽  
pp. 25-39 ◽  
Author(s):  
C.R. Dahlin ◽  
R.P. Balda ◽  
C. Slobodchikoff
Keyword(s):  
Sex Effects ◽  
Pinyon Jay

scholarly journals Mesotocin influences pinyon jay prosociality

2018 ◽  
Vol 14 (4) ◽  
pp. 20180105 ◽  
Author(s):  
J. F. Duque ◽  
W. Leichner ◽  
H. Ahmann ◽  
J. R. Stevens
Keyword(s):  
Functional Role ◽  
Choice Task ◽  
Prosocial Behaviour ◽  
Evolutionarily Conserved ◽  
Hormonal Mechanism ◽  
The Subject ◽  
Empty Cage ◽  
Pinyon Jay ◽  
Prosocial Behaviours

Many species exhibit prosocial behaviour, in which one individual's actions benefit another individual, often without an immediate benefit to itself. The neuropeptide oxytocin is an important hormonal mechanism influencing prosociality in mammals, but it is unclear whether the avian homologue mesotocin plays a similar functional role in birds. Here, we experimentally tested prosociality in pinyon jays ( Gymnorhinus cyanocephalus ), a highly social corvid species that spontaneously shares food with others. First, we measured prosocial preferences in a prosocial choice task with two different pay-off distributions: Prosocial trials delivered food to both the subject and either an empty cage or a partner bird, whereas Altruism trials delivered food only to an empty cage or a partner bird (none to subject). In a second experiment, we examined whether administering mesotocin influenced prosocial preferences. Compared to choices in a control condition, we show that subjects voluntarily delivered food rewards to partners, but only when also receiving food for themselves (Prosocial trials), and administration of high levels of mesotocin increased these behaviours. Thus, in birds, mesotocin seems to play a similar functional role in facilitating prosocial behaviours as oxytocin does in mammals, suggesting an evolutionarily conserved hormonal mechanism for prosociality.

The Pinyon Jay

The Condor ◽  
1902 ◽  
Vol 4 (1) ◽  
pp. 14-14
Author(s):  
H. C. Johnson
Keyword(s):  
Pinyon Jay

scholarly journals Behavior-specific occupancy patterns of Pinyon Jays (Gymnorhinus cyanocephalus) in three Great Basin study areas and significance for pinyon-juniper woodland management

2020 ◽  
Author(s):  
John D. Boone ◽  
Chris Witt ◽  
Elisabeth M. Ammon
Keyword(s):  
Great Basin ◽  
Tree Cover ◽  
Conservation Strategies ◽  
Metric Dimension ◽  
Inventory Analysis ◽  
Woodland Management ◽  
Conservation Measures ◽  
Occupancy Patterns ◽  
Juniper Woodland ◽  
Pinyon Jay

AbstractThe Pinyon Jay is a highly-social, year-round inhabitant of pinyon-juniper woodlands in the western United States. Range-wide, Pinyon Jays have declined ~ 3 – 4% per year for at least the last half-century. At the same time, large acreages of pinyon-juniper woodland have been removed or thinned to improve habitat for Greater Sage-Grouse or other game species across much of the Great Basin, which is home to nearly half of the global population of Pinyon Jays. Occupancy patterns and habitat use of Pinyon Jays have not been well characterized across much of the species’ range, and obtaining this information is necessary for better understanding the causes of ongoing declines and determining useful conservation strategies. Our goal of this study was to identify the characteristics of areas used by Pinyon Jays for several critical life history components and to thereby facilitate the inclusion of Pinyon Jay conservation measures in the design of vegetation management projects. To accomplish this, we studied Pinyon Jays in three widely separated study areas using radio telemetry and direct observation, and measured key attributes of their locations and a separate set of randomly-selected control sites using the U. S. Forest Service’s Forest Inventory Analysis protocol. Data visualizations, non-metric dimension scaling ordinations, and logistic regressions of the resulting data indicated that Pinyon Jay occupancy was concentrated in a distinct subset of available pinyon-juniper woodland habitat, and further that Pinyon Jays used different habitats, arrayed along elevational and tree-cover gradients, for seed caching, foraging, and nesting. Caching was concentrated in low-elevation, relatively flat areas with low tree cover; foraging occurred at slightly higher elevations with moderate tree cover, and nesting was concentrated in somewhat higher areas with greater tree cover and higher stand density. All three of these Pinyon Jay behavior types were highly concentrated within the lower-elevation band of pinyon-juniper woodland close to the woodland-shrubland ecotone. Because woodland removal projects in the Great Basin are often concentrated in these same areas, it is critical to incorporate conservation measures informed by Pinyon Jay occupancy patterns into existing woodland management paradigms, protocols, and practices.

scholarly journals Behavior-specific occurrence patterns of Pinyon Jays (Gymnorhinus cyanocephalus) in three Great Basin study areas and significance for pinyon-juniper woodland management

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0237621
Author(s):  
John D. Boone ◽  
Chris Witt ◽  
Elisabeth M. Ammon
Keyword(s):  
Great Basin ◽  
Vegetation Management ◽  
Tree Cover ◽  
Conservation Strategies ◽  
Principle Components Analysis ◽  
Woodland Management ◽  
Conservation Measures ◽  
Juniper Woodland ◽  
Occurrence Patterns ◽  
Pinyon Jay

The Pinyon Jay is a highly social, year-round inhabitant of pinyon-juniper and other coniferous woodlands in the western United States. Range-wide, Pinyon Jays have declined ~ 3–4% per year for at least the last half-century. Occurrence patterns and habitat use of Pinyon Jays have not been well characterized across much of the species’ range, and obtaining this information is necessary for better understanding the causes of ongoing declines and determining useful conservation strategies. Additionally, it is important to better understand if and how targeted removal of pinyon-juniper woodland, a common and widespread vegetation management practice, affects Pinyon Jays. The goal of this study was to identify the characteristics of areas used by Pinyon Jays for several critical life history components in the Great Basin, which is home to nearly half of the species’ global population, and to thereby facilitate the inclusion of Pinyon Jay conservation measures in the design of vegetation management projects. To accomplish this, we studied Pinyon Jays in three widely separated study areas using radio telemetry and direct observation and measured key attributes of their locations and a separate set of randomly-selected control sites using the U. S. Forest Service’s Forest Inventory Analysis protocol. Data visualizations, principle components analysis, and logistic regressions of the resulting data indicated that Pinyon Jays used a distinct subset of available pinyon-juniper woodland habitat, and further suggested that Pinyon Jays used different but overlapping habitats for seed caching, foraging, and nesting. Caching was concentrated in low-elevation, relatively flat areas with low tree cover; foraging occurred at slightly higher elevations with generally moderate but variable tree cover; and nesting was concentrated in slightly higher areas with high tree and vegetation cover. All three of these Pinyon Jay behavior types were highly concentrated within the lower-elevation band of pinyon-juniper woodland close to the woodland-shrubland ecotone. Woodland removal projects in the Great Basin are often concentrated in these same areas, so it is potentially important to incorporate conservation measures informed by Pinyon Jay occurrence patterns into existing woodland management paradigms, protocols, and practices.

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