Comparative Anatomy of Blue-and-Yellow Macaw (Ara ararauna) and Toco Toucan (Ramphastos toco) Beaks Using Macroscopic Analysis and Computerized Tomography

Massari, Catia Helena de Almeida Lima; Silva, Adriano Ferreira; Magalhães, Henrique Inhauser Riceti; Silva, Dara Rúbia Souza; Sasahara, Taís Harumi de Castro; Miglino, María Angélica

doi:10.4067/s0717-95022020000601591

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“…In addition to the rostrum shape, birds may have variations in the thickness, composition and sensitivity of the keratin sheath that covers the beak (Coles, 2007), which can also influence HU values. The toco toucan has a beak considered a thermoregulatory organ, highly vascularized, composed of cancellous bone and with an extensive and fine trabecular bone network (Cornelissen & Ritchie, 1994; Massari et al., 2020; Tattersall et al., 2017), which justifies the higher negative values compared to other species, both on the maxillary and mandibular rostra. The highest positive values of HU were in buff‐necked ibis in both maxillary and mandibular rostra.…”

Section: Discussionmentioning

confidence: 99%

Radiologic and computed tomography evaluation of the beaks from three bird species

da Silva,

Rahal,

da Silva

et al. 2024

Anat Histol Embryol

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This study aimed to evaluate the beaks of three species of birds using radiography and computed tomography (CT). The mean lengths of maxillary and mandibular rostra on radiographs were highest for toco toucan, followed by buff‐necked ibis, and least for red‐legged seriema birds. The height and width of maxillary and mandibular rostra measured on CT had mean values highest for toco toucans, followed by red‐legged seriema, and least for buff‐necked ibis. Except for the proximal region of the maxillary rostrum, the HU values were positive for other regions of the maxillary and mandibular rostra in the buff‐necked ibis and red‐legged seriema and negative in all for the toco toucan.

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Section: Discussionmentioning

confidence: 99%

Radiologic and computed tomography evaluation of the beaks from three bird species

da Silva,

Rahal,

da Silva

et al. 2024

Anat Histol Embryol

View full text Add to dashboard Cite

show abstract

Comparative Anatomy of Blue-and-Yellow Macaw (Ara ararauna) and Toco Toucan (Ramphastos toco) Beaks Using Macroscopic Analysis and Computerized Tomography

Abstract: Comparative anatomy of blue-and-yellow macaw (Ara ararauna) and toco toucan (Ramphastos toco) beaks using macroscopic analysis and computerized tomography.

Cited by 1 publication

References 5 publications

Radiologic and computed tomography evaluation of the beaks from three bird species

Radiologic and computed tomography evaluation of the beaks from three bird species

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