scholarly journals Observatoire d’oiseaux du Parc national du Bic : 12 ans de suivi printanier des oiseaux de proie migrateurs

2014 ◽  
Vol 139 (1) ◽  
pp. 4-11
Author(s):  
Jean-Sébastien Guénette ◽  
Yong Lang
Keyword(s):  
Haliaeetus Leucocephalus ◽  
Aquila Chrysaetos ◽  
Falco Peregrinus ◽  
Cathartes Aura ◽  
Buteo Jamaicensis ◽  
Accipiter Striatus

Le belvédère Raoul-Roy, situé dans le Parc national du Bic, est l’un des meilleurs sites au Québec pour observer la migration des oiseaux de proie. Un programme de suivi a été mis en place en 2002 et a notamment pour objectif de caractériser l’abondance et la richesse des oiseaux de proie passant au sud de l’estuaire du fleuve Saint-Laurent, et, par ricochet, l’évolution temporelle du passage printanier de chacune des espèces. Le programme vise aussi à déterminer les conditions favorables à leur migration. Jusqu’à maintenant, 17 espèces d’oiseaux de proie ont été recensées, les plus abondantes étant la buse à queue rousse (Buteo jamaicensis) et l’épervier brun (Accipiter striatus). Le programme a permis aussi de documenter l’augmentation des passages de certaines espèces, dont l’urubu à tête rouge (Cathartes aura), le pygargue à tête blanche (Haliaeetus leucocephalus), l’aigle royal (Aquila chrysaetos) et le faucon pèlerin (Falco peregrinus). Une meilleure connaissance de la migration printanière des oiseaux de proie aidera à leur conservation, notamment au processus d’évaluation environnementale de futurs projets de développement d’énergie éolienne dans l’est du Québec.

scholarly journals Riqueza y abundancia de rapaces diurnas del Cañón de Fernández, Lerdo, Durango

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Jesús Favela-Mesta ◽  
Vanessa Martínez-García
Keyword(s):  
Cathartes Aura ◽  
Buteo Jamaicensis ◽  
Accipiter Striatus ◽  
Parabuteo Unicinctus

El monitoreo biológico es esencial para comprender la dinámica poblacional, los procesos ecológicos y los problemas emergentes. En este estudio determinamos la riqueza y abundancia de las rapaces diurnas en el Parque Estatal Cañón de Fernández en Durango, México. Detectamos 11 especies, cinco de éstas están bajo alguna categoría de riesgo según la Norma Oficial Mexicana 059-2010: gavilán pecho canela (Accipiter striatus), gavilán de cooper (A. cooperii), aguililla negra menor (Buteogallus anthracinus), aguililla rojinegra (Parabuteo unicinctus) y aguililla pecho rojo (Buteo lineatus). Las especies más abundantes fueron Coragyps atratus, Cathartes aura y Buteo jamaicensis. El hábitat donde obtuvimos más registros fue el bosque de galería. Las rapaces del área ven amenazada su conservación por la pérdida de hábitat, cacería y electrocución.

scholarly journals L’EROP : 10 ans pour le rétablissement des oiseaux de proie au Québec

2014 ◽  
Vol 139 (1) ◽  
pp. 90-95
Author(s):  
Antoine St-Louis ◽  
Isabelle Gauthier ◽  
Sylvie Beaudet ◽  
Lise Deschênes ◽  
Alain Forest ◽  
...  
Keyword(s):  
Haliaeetus Leucocephalus ◽  
Aquila Chrysaetos ◽  
Falco Peregrinus ◽  
Mise En Œuvre ◽  
Asio Flammeus

L’Équipe de rétablissement des oiseaux de proie du Québec (EROP) a été fondée en 2004, à la suite de la fusion des équipes de rétablissement du faucon pèlerin (Falco peregrinus), du pygargue à tête blanche (Haliaeetus leucocephalus) et de l’aigle royal (Aquila chrysaetos). À ces espèces d’intérêt pour l’EROP s’est ajouté récemment le hibou des marais (Asio flammeus). À l’aide des plans de rétablissement de chacune des espèces, l’EROP veille à la mise en oeuvre de mesures de conservation (p. ex. acquisition de connaissances, sensibilisation, protection) visant à redresser la situation des populations d’oiseaux de proie en situation précaire au Québec. Cet article présente le mandat, le mode de fonctionnement et les principales réalisations de l’EROP au cours de la dernière décennie.

The auditory attributes of Golden Eagles: Do Golden (Aquila chrysaetos) and Bald Eagles (Haliaeetus leucocephalus) share the same auditory space?

2018 ◽  
Vol 144 (3) ◽  
pp. 1742-1742
Author(s):  
Edward J. Walsh ◽  
Peggy B. Nelson ◽  
Julia Ponder ◽  
Christopher Milliren ◽  
Christopher Feist ◽  
...  
Keyword(s):  
Haliaeetus Leucocephalus ◽  
Aquila Chrysaetos ◽  
Bald Eagles ◽  
Auditory Space ◽  
Golden Eagles

scholarly journals Enrichment Preferences of Raptors at Elmwood Park Zoo

2018 ◽  
Vol 1 (1) ◽  
pp. 21-27
Author(s):  
Elisa Tyler Tyler
Keyword(s):  
Environmental Enrichment ◽  
Well Being ◽  
Bald Eagle ◽  
Future Research ◽  
Haliaeetus Leucocephalus ◽  
Bald Eagles ◽  
Buteo Jamaicensis ◽  
In Captivity ◽  
Natural Enrichment

Environmental enrichment is often offered to animals in captivity to aid in enhancing quality of life by providing appropriate environmental stimuli that improve psychological and physiological well-being. Due to the limited amount of research conducted on raptors and enrichment, I sought to determine raptor preferences of enrichment types through the observation of captive bald eagles (Haliaeetus leucocephalus) and red-tailed hawks (Buteo jamaicensis) in the education department at Elmwood Park Zoo. I predicted that the raptors would interact more with natural enrichment items compared to ones that were man-made. Although results showed only the female bald eagle to interact enough with the enrichment items to gather an adequate number of observations, she was found to interact significantly more frequently with natural enrichment items compared to ones that were man-made (p 0.0001, FET). These results are not meant to infer that all female bald eagles prefer natural enrichment items over man-made ones, or that all male bald eagles and female and male red-tailed hawks do not prefer any enrichment items. Nonetheless, they justify future research on environmental enrichment preferences involving many more individuals and many more taxa to determine more appropriate enrichment regimens for captive birds of prey.

Responses of Blue Jays (Cyanocitta Cristata) to Raptors that Differ in Predatory Threat

2018 ◽  
Vol 11 (3) ◽  
pp. 159-166 ◽  
Author(s):  
Julie A. Dahl ◽  
Gary Ritchison
Keyword(s):  
Low Frequency ◽  
Peak Frequency ◽  
Cyanocitta Cristata ◽  
Bubo Virginianus ◽  
Corvus Brachyrhynchos ◽  
Buteo Jamaicensis ◽  
Accipiter Cooperii ◽  
Accipiter Striatus ◽  
Breeding Seasons ◽  
Blue Jays

Some species of birds use their vocalisations to communicate predator presence and the level of threat they pose, including two species of corvids (Corvidae), American Crows (Corvus brachyrhynchos) and Siberian Jays (Perisoreus infaustus). Our objective was to determine if Blue Jays (Cyanocitta cristata), another corvid, also use specific calls or vary the characteristics of certain calls to convey information about the level of threat posed by aerial predators. During the non-breeding seasons of 2014 and 2015, we recorded and analysed the vocal responses of Blue Jays to study skins of six species of raptors that varied in size and the level of threat they pose to Blue Jays. Experiments were conducted at seven locations in Madison County, Kentucky. The mean number of Blue Jays present during trials was 2.6, and Blue Jays uttered five different vocalisations during trials, with ditonal and monotonal jeers given most frequently. The rate at which Blue Jays uttered ditonal jeers differed among trials, with rates highest during trials with an Eastern Screech-Owl (Megascops asio) and a Sharp-shinned Hawk (Accipiter striatus). However, the characteristics of ditonal and monotonal jeers (duration, low frequency, high frequency, and peak frequency) did not differ among trials. These results suggest that Blue Jays may either perceive Eastern Screech-Owls and Sharp-shinned Hawks as the greatest threats or, alternatively, as potential, but less threatening predators, and, therefore, they were willing to take greater risks when mobbing them. In contrast, Blue Jays mobbed the other raptors, i.e. American Kestrels (Falco sparverius), Red-tailed Hawks (Buteo jamaicensis), and Great Horned Owls (Bubo virginianus), with much less intensity, likely because they posed less of a threat or, in the case of Cooper's Hawks (Accipiter cooperii) that are known predators of Blue Jays, perhaps because mobbing with greater intensity, e.g. approaching more closely, posed too great a risk. Blue Jays in our study used the same calls with the same characteristics when responding to potential predators, only calling rates differed. However, such variation in calling rates when mobbing would likely provide useful information about the presence of, and possibly the threat posed by, potential predators for conspecifics and, perhaps, heterospecifics.

scholarly journals Bacterial Diversity in Feces of Wild Bald Eagles, Turkey Vultures and Common Ravens from the Pacific Northwest Coast, U.S.A

2019 ◽  
Author(s):  
Rocio Crespo ◽  
Scot E Dowd ◽  
Daniel E. Varland ◽  
Scott Ford ◽  
Thomas E. Hamer
Keyword(s):  
Bacterial Diversity ◽  
Pacific Northwest ◽  
Pathogenic Bacteria ◽  
Haliaeetus Leucocephalus ◽  
Bald Eagles ◽  
Cathartes Aura ◽  
Pacific Northwest Coast ◽  
16S Gene ◽  
The Pacific ◽  
Turkey Vultures

AbstractBirds harbor diverse microorganisms in their guts, which collectively fulfill important roles in providing their hosts with nutrition and protection from pathogens. Although numerous studies have investigated the presence of certain pathogenic bacteria in the feces of wild birds, only a few have attempted to investigate the microbiota of the gut. This study analyzed the avian bacteria present in the cloaca of avian scavengers captured on coastal beaches of Washington and Oregon between 2013 and 2015: 10 turkey vultures (Cathartes aura), 9 bald eagles (Haliaeetus leucocephalus), and 2 common ravens (Corvus corax). We used illumina sequencing based on the V4 region of the 16s gene was to characterize the bacterial diversity. Our investigation revealed phylum-level differences in the microbiome of turkey vultures, compared with bald eagles and common ravens. Substantial microbiome differences were found between bald eagles and ravens below the phylum level. Although little is known about the possible relations among these microorganisms, our analyses provides the first integrated look at the composition of the avian microbiota and serves as a foundation for future studies in this area.

scholarly journals Tufted Puffins (Fratercula Cirrhata) Respond to Predation Danger During Colony Approach Flights

The Auk ◽  
2007 ◽  
Vol 124 (1) ◽  
pp. 63-70
Author(s):  
BriAnne Addison ◽  
Ronald C. Ydenberg ◽  
Barry D. Smith
Keyword(s):  
Lower Risk ◽  
Risk Level ◽  
Haliaeetus Leucocephalus ◽  
Falco Peregrinus ◽  
Bald Eagles ◽  
Escape Route ◽  
Activity Rate ◽  
Level Of Activity ◽  
Peregrine Falcons ◽  
Predation Danger

AbstractIn spite of their putative importance in the evolution of certain traits (e.g., nocturnality, coloniality, cliff nesting), the effects of aerial predators on behavior of adult seabirds at colonies have been poorly investigated. We hypothesized that Tufted Puffins (Fratercula cirrhata) respond to danger posed by aerial predators by modifying their behavior to mitigate danger. We observed Tufted Puffins making repeated colony fly-ins and departures and characterized (1) the timing of this behavior, (2) the activity rate (number of birds arriving or departing), and (3) the risk-level of activity, with respect to predation danger posed by Bald Eagles (Haliaeetus leucocephalus) and Peregrine Falcons (Falco peregrinus). As we predicted, we found that Tufted Puffins (1) dilute danger by synchronizing their fly-in and departure activities, (2) reduce fly-in and departure activity rates when predators are present, and (3) switch to lower-risk fly-in activities (e.g., staying over water where they have an escape route from an aerial attack) when predators are present.Réaction de Fratercula cirrhata au Danger de Prédation au cours des Vols d'Approche de la Colonie

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