A Hybrid between Turkey Vulture and Black Vulture

The Auk ◽  
1937 ◽  
Vol 54 (3) ◽  
pp. 384-384 ◽  
Author(s):  
E. A. McIlhenny
Keyword(s):  
Turkey Vulture ◽  
Black Vulture

scholarly journals First record of death-feigning in Black Vultures (Coragyps atratus) (Cathartidae)

2019 ◽  
Vol 27 (4) ◽  
pp. 242-244
Author(s):  
Marjory Auad Spina ◽  
Luís Fábio Silveira
Keyword(s):  
Bird Species ◽  
First Record ◽  
Cathartes Aura ◽  
Turkey Vulture ◽  
Death Feigning ◽  
Black Vulture ◽  
Natural Predator

AbstractDeath-feigning is a behavior ability with the purpose of allowing prey to evade from predators. Despite death-feigning is recorded on a wide variety of bird species, it has been recorded only once in vultures, more specifically on a Turkey Vulture (Cathartes aura) nest. In addition to this record, we report this behavior while manipulating an individual of Black Vulture (Coragyps atratus) in Brazil. This behavior is not usual in Cathartidae since adult vultures do not have a known natural predator.

Hematocrit and Protein Concentration of Black Vulture and Turkey Vulture Blood

The Condor ◽  
1988 ◽  
Vol 90 (4) ◽  
pp. 937-938 ◽  
Author(s):  
John S. Coleman ◽  
James D. Fraser ◽  
Patrick F. Scanlon
Keyword(s):  
Protein Concentration ◽  
Turkey Vulture ◽  
Black Vulture

scholarly journals Trophic niche overlap among scavengers in Patagonia supports the condor-vulture competition hypothesis

2017 ◽  
Vol 28 (3) ◽  
pp. 390-402 ◽  
Author(s):  
FERNANDO BALLEJO ◽  
SERGIO A. LAMBERTUCCI ◽  
ANA TREJO ◽  
LUCIANO J. M. DE SANTIS
Keyword(s):  
Human Activities ◽  
Food Resource ◽  
Niche Overlap ◽  
Shannon Index ◽  
Trophic Niche ◽  
Foraging Strategies ◽  
Cathartes Aura ◽  
Turkey Vulture ◽  
Black Vulture ◽  
Andean Condor

SummaryAnimals that share resources tend to use different foraging strategies in order to decrease potential competition. Scavenging birds using the same nutritional resources can segregate into different space and time scales. However, it has been suggested that when the species do not co-evolve to achieve such segregation competition may result. Our aim was to study the trophic niche overlap between three species of obligate scavengers, the Andean CondorVultur gryphus, Turkey VultureCathartes auraand American Black VultureCoragyps atratus, which are the main avian consumers of carcasses in north-western Patagonia. Black Vultures arrived in the area relatively recently, have expanded their distribution following human activities, and have been suggested to compete with the threatened condor. We collected pellets in communal roosts of the three species to determine their diet, and to estimate the diversity (Shannon Index) and diet similarity (Pianka overlap index). We found that the Turkey Vulture has greater niche breadth and, apart from domestic livestock, it incorporates smaller items such as fish, reptiles and a great number of birds, carnivores and mice. Although the Black Vulture diet includes arthropods, they feed primarily on introduced ungulates, overlapping more with condor diet when roosting far from urban centres. As these latter two species share the same food resource, human activities that positively affect the abundance of the Black Vulture could increase competition among them, with possible implications for the conservation of the Andean Condor.

Microscopic Analysis of the Plumulaceous Feather Characteristics of Cathartiformes and Accipitriformes In North America

2021 ◽  
Author(s):  
Charles P. J. Coddington ◽  
Carla J. Dove ◽  
David A. Luther
Keyword(s):  
North America ◽  
Microscopic Analysis ◽  
Internode Length ◽  
Circumstantial Evidence ◽  
Taxonomic Identification ◽  
Cathartes Aura ◽  
Turkey Vulture ◽  
Family Level ◽  
Black Vulture ◽  
Identification Of Species

ABSTRACT Although variation in microscopic plumulaceous (downy) feather characters is known to be useful in taxonomic identifications of birds, the conserved characters unique to most avian orders remain understudied. We examined plumulaceous feather characters (morphometric and observed pigmentation patterns [qualitative]) within three avian families (Cathartidae, Pandionidae, Accipitridae) occurring in North America that often require taxonomic identification based on incomplete or fragmentary remains. We found significant quantitative differences among these three families for measurements of barbule length, node width, average number of nodes per barbule, and internode length. We observed additional differences in pigmentation patterns and spine distribution at nodes. Differences in pigment patterns and intensity are diagnostic for distinguishing Black Vulture (Coragyps atratus) from Turkey Vulture (Cathartes aura) within Cathartidae. Further observed differences of a higher percentage of spined structures present at node junctions along the length of barbules are diagnostic of Pandionidae. Within Accipitridae, pigmentation patterns and pigment intensity separate Swallow-tailed Kite (Elanoides forficatus) and White-tailed Kite (Elanus leucurus) from all other taxa; and barbule length, together with average nodes per barbule is unique to Northern Harrier (Circus hudsonius) in the families examined in this study. Although significant differences in a combination of microscopic feather characters among species were seldom observed in this study, family level differences were consistently documented. Results support the use of a suite of microscopic characters in combination with macroscopic feather features, geographic distributions, molecular methods, and other circumstantial evidence to aid in the identification of species of birds from feathers.

Nesting of the Turkey Vulture

The Auk ◽  
1938 ◽  
Vol 55 (3) ◽  
pp. 468-470
Keyword(s):  
Turkey Vulture

Mexican Turkey Vulture in Southern Florida

The Auk ◽  
1938 ◽  
Vol 55 (3) ◽  
pp. 520-521 ◽  
Author(s):  
Thomas D. Burleigh
Keyword(s):  
Turkey Vulture ◽  
Southern Florida
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