Morphological description of the alimentary canal and adnexal glands in Amazilia tzacatl, Amazilia saucerottei, Amazilia amabilis and Anthrachotorax nigricollis species DOI

John Edisson Muñoz‐Zuluaga,

Julián Andrés Monroy‐Hurtado,

Julián D Muñoz-Duque

et al.

Anatomia Histologia Embryologia, Journal Year: 2023, Volume and Issue: 53(1)

Published: Oct. 21, 2023

Abstract The hummingbird family (Trochilidae) includes the smallest and most metabolically active vertebrates. They have a high energy demand because of their extraordinarily metabolic rates during hovering while looking for food. morphology digestive apparatus is related to feeding habits species. anatomy histology in these birds not been thoroughly described except tongue. Therefore, this study aimed describe gross alimentary canal adnexal glands four species from family: Amazilia tzacatl ( n = 2), saucerottei 1), amabilis 1) Anthracothorax nigricollis 1). was found be very short. epithelium oesophagus crop showed variable degrees keratinization parakeratotic areas as normal conditions. A dorsal observed differential characteristic birds. Like other birds, ventricular mucosa hummingbirds covered protected by cuticle tunica muscularis constituted three muscle layers. There no isthmus between proventriculus ventriculus. intestine presents well‐differentiated duodenum jejunum. However, ileum nor caeca were identified. intestinal villi length, base width, crypt depth area differences among specimens studied small large intestines. In addition, variations thickness smooth along intestine. all species, liver composed two lobes (right left), gall bladder inspection or histological sections. Finally, pancreas diffused organ forming islets Some anatomical mainly concerning . Hummingbirds interesting distinctive morphological characteristics. possess unique intriguing Future comparative studies anatomy, function are required. Expanding our understanding morphophysiology bird crucial. it necessary conduct more comprehensive encompassing wider range including larger number individuals obtain conclusive findings.

Language: Английский

A novel feeding mechanism: Sunbirds drink nectar via intralingual suction DOI Open Access
David Cuban, Cynthia Y. Wang‐Claypool, Yohanna Yohanna

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: May 15, 2024

Abstract Nectarivory has independently evolved many times among birds, yet little is known about the diversity of feeding mechanisms that enable specialized taxa to efficiently collect this energyrich resource. Multiple avian groups have converged on evolving elongated bills and tube-like tongues adapted for nectar extraction. Old World sunbirds (family Nectariniidae) stand out as having greatest degree convergence in bill tongue morphology with well-studied highly-specialized New hummingbirds Trochilidae) which fill their via elastic filling. However, using museum specimens, high-speed video, fluid modeling, we show use a previously undescribed unique drinking mechanism not found any other animal: intralingual suction through inside hollow tubular tongues, remarkable feat animals without lips or cheeks.

Language: Английский

Citations

0
Morphological description of the alimentary canal and adnexal glands in Amazilia tzacatl, Amazilia saucerottei, Amazilia amabilis and Anthrachotorax nigricollis species DOI

John Edisson Muñoz‐Zuluaga,

Julián Andrés Monroy‐Hurtado,

Julián D Muñoz-Duque

et al.

Anatomia Histologia Embryologia, Journal Year: 2023, Volume and Issue: 53(1)

Published: Oct. 21, 2023

Abstract The hummingbird family (Trochilidae) includes the smallest and most metabolically active vertebrates. They have a high energy demand because of their extraordinarily metabolic rates during hovering while looking for food. morphology digestive apparatus is related to feeding habits species. anatomy histology in these birds not been thoroughly described except tongue. Therefore, this study aimed describe gross alimentary canal adnexal glands four species from family: Amazilia tzacatl ( n = 2), saucerottei 1), amabilis 1) Anthracothorax nigricollis 1). was found be very short. epithelium oesophagus crop showed variable degrees keratinization parakeratotic areas as normal conditions. A dorsal observed differential characteristic birds. Like other birds, ventricular mucosa hummingbirds covered protected by cuticle tunica muscularis constituted three muscle layers. There no isthmus between proventriculus ventriculus. intestine presents well‐differentiated duodenum jejunum. However, ileum nor caeca were identified. intestinal villi length, base width, crypt depth area differences among specimens studied small large intestines. In addition, variations thickness smooth along intestine. all species, liver composed two lobes (right left), gall bladder inspection or histological sections. Finally, pancreas diffused organ forming islets Some anatomical mainly concerning . Hummingbirds interesting distinctive morphological characteristics. possess unique intriguing Future comparative studies anatomy, function are required. Expanding our understanding morphophysiology bird crucial. it necessary conduct more comprehensive encompassing wider range including larger number individuals obtain conclusive findings.

Language: Английский

Citations

0