Nest Sharing Between an American Robin and a Northern Cardinal

2009 ◽  
Vol 121 (2) ◽  
pp. 424-426 ◽  
Author(s):  
Paul W. Govoni ◽  
Keith S. Summerville ◽  
Muir D. Eaton
Keyword(s):  
American Robin ◽  
Northern Cardinal ◽  
Nest Sharing

scholarly journals Species-Specific Responses of Bird Song Output in the Presence of Drones

2020 ◽  
Author(s):  
Andrew M. Wilson ◽  
Kenneth S. Boyle ◽  
Jennifer L. Gilmore ◽  
Cody J. Kiefer ◽  
Matthew F. Walker
Keyword(s):  
Ground Level ◽  
Wald Test ◽  
Mixed Effect ◽  
Yellow Warbler ◽  
American Robin ◽  
Northern Cardinal ◽  
Geothlypis Trichas ◽  
Field Sparrow ◽  
Species Specific ◽  
Behavioral Impact

AbstractDrones are now widely used to study wildlife, but applications for studying bioacoustics have been limited. Drones can be used to collect data on bird vocalizations, but an ongoing concern is that noise from the drones could change bird vocalization behavior. To test this behavioral impact we conducted an experiment using 30 sound localization arrays to track the song output of seven songbird species before, during, and after a 3-minute flight of a small quadcopter drone hovering at 50 m above ground level. We analyzed 8,303 song bouts, of which 2,285 song bouts of 184 individual birds were within 50 meters of the array centers. We used linear mixed effect models to assess patterns in song output showed patterns that could be attributed to the drone’s presence. We found no evidence of any effect of the drone for five species: American Robin Turdus migratorius, Common Yellowthroat Geothlypis trichas, Field Sparrow Spizella pusilla, Song Sparrow Melospiza melodia, and Indigo Bunting Passerina cyanea. However, we found a substantial decrease in Yellow Warbler Setophaga petechia song detections during the 3-minute drone hover, such that there was an 81% drop in detections in the 3rd minute (Wald-test, p<0.001), compared with before the drone’s introduction. In contrast, the number of singing Northern Cardinal Cardinalis cardinalis increased after the drone was introduced, and remained almost five-fold higher for 4-minutes after the drone departed (P<0.001). Further, we found an increase in cardinal contact/alarm calls when the drone was overhead, with the elevated calling-rate sustaining for 2 minutes after the drone had departed (P<0.001). Our study suggests that responses of songbirds to drones may be species-specific, an important consideration when proposing the use of drones in avian studies. We note that recent advances in drone technology have resulted in much quieter drones, which makes us hopeful that the impacts that we detected could be greatly reduced.

New data on systematics of the quill mites of the genus Syringophiloidus Kethley, 1970 (Acari, Syringophilidae) from North American birds

2009 ◽  
Vol 54 (1) ◽  
Author(s):  
Maciej Skoracki ◽  
Maureen Flannery ◽  
Greg Spicer
Keyword(s):  
New Species ◽  
Molothrus Ater ◽  
Turdus Migratorius ◽  
American Robin ◽  
Cardinalis Cardinalis ◽  
Northern Cardinal ◽  
Sialia Mexicana ◽  
Thryothorus Ludovicianus ◽  
Carolina Wren ◽  
Melanerpes Formicivorus

AbstractSix species of the syringophilid mites belonging to the genus Syringophiloidus Kethley, 1970 (Acari, Prostigmata) are recorded from eight avian hosts from USA. Four new species are described and illustrated: S. molothrus sp. nov. from the Brown-headed Cowbird Molothrus ater (Boddaert) (Passeriformes, Icteridae), S. carolae sp. nov. from the Acorn Woodpecker Melanerpes formicivorus (Swainson) (Piciformes, Picidae) and from the Northern Cardinal Cardinalis cardinalis (Linnaeus) (Passeriformes, Cardinalidae), S. sialius sp. nov. from the Western Bluebird Sialia mexicana Swainson (Passeriformes, Turdidae), and S. thryothorus sp. nov. from the Carolina Wren Thryothorus ludovicianus (Latham) (Passeriformes, Troglodytidae). The previously described species S. motacillae Bochkov et Mironov, 1998 is new for USA. Two host species, the American Robin Turdus migratorius Linnaeus (Turdidae) and the Steller’s Jay Cyanocitta stelleri (Gmelin) (Passeriformes, Corvidae), are new for S. presentalis Chirov et Kravtsova, 1995.

Predation on Northern Cardinal Nests: Does Choice of Nest Site Matter?

The Condor ◽  
1994 ◽  
Vol 96 (3) ◽  
pp. 761-768 ◽  
Author(s):  
Tamatha S. Filliater ◽  
Randall Breitwisch ◽  
Paul M. Nealen
Keyword(s):  
Nest Site ◽  
Northern Cardinal

Grooming in the veery and the American robin: Evidence for a simple timing hierarchy

1986 ◽  
Vol 12 (3) ◽  
pp. 227-236 ◽  
Author(s):  
Karen K. Hatch ◽  
Louis Lefebvre ◽  
R.E. Lemon
Keyword(s):  
American Robin

scholarly journals Nesting strategy shapes territorial aggression but not testosterone: a comparative approach in female and male birds

2020 ◽  
Author(s):  
SE Lipshutz ◽  
KA Rosvall
Keyword(s):  
Tree Swallow ◽  
Comparative Approach ◽  
Female Competition ◽  
American Robin ◽  
Territorial Aggression ◽  
Physical Attack ◽  
Cavity Nesting ◽  
Comparative Framework ◽  
Underlying Mechanisms ◽  
Close Relatives

Our understanding of the proximate and ultimate mechanisms shaping competitive phenotypes primarily stems from research on male-male competition for mates, even though female-female competition is also widespread. Obligate secondary cavity-nesting has evolved repeatedly across avian lineages, providing a useful comparative context to explore how competition over limited nest cavities shapes aggression and its underlying mechanisms across species. Although evidence from one or another cavity-nesting species suggests that territorial aggression is adaptive in both females and males, this has not yet been tested in a comparative framework. We tested the hypothesis that cavity-nesting generates more robust territorial aggression, in comparison to close relatives with less restrictive nesting strategies. Our focal species were two obligate secondary cavity-nesting species and two related species with more flexible nesting strategies in the same avian family: tree swallow (Tachycineta bicolor) vs. barn swallow (Hirundo rustica); Eastern bluebird (Sialia sialis) vs. American robin (Turdus migratorius). We assayed conspecific territorial aggression, and found that cavity-nesting species physically attacked a simulated intruder more often than their close relatives. This pattern held for both females and males. Because territorial aggression is often associated with elevated testosterone, we also hypothesized that cavity-nesting species would exhibit higher testosterone levels in circulation. However, cavity-nesting species did not have higher testosterone in circulation for either sex, despite some correlative evidence that testosterone is associated with higher rates of physical attack in female tree swallows. Our focus on a competitive context that is relevant to both sexes – competition over essential breeding resources – provides a useful comparative framework for co-consideration of proximate and ultimate drivers of reproductive competition in females and males.

Polygyny in Canada Geese: An Unusual Example of Nest Sharing

2001 ◽  
Vol 113 (1) ◽  
pp. 109-110 ◽  
Author(s):  
J. MICHAEL CHECKETT ◽  
JOHN M. COLUCCY ◽  
RONALD D. DROBNEY
Keyword(s):  
Canada Geese ◽  
Nest Sharing
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