Description of Collared Trogon (Trogon Collaris) Nests in the Sierra De Zongolica, Veracruz, Mexico

Hernández-Ramírez, Ángel; Moreno, Axel Fuentes; Vela, René Avalos

doi:10.58843/ornneo.v32i2.885

Ornitol. Neotrop.

2022

DOI: 10.58843/ornneo.v32i2.885

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Description of Collared Trogon (Trogon Collaris) Nests in the Sierra De Zongolica, Veracruz, Mexico

Ángel Hernández-Ramírez¹,

Axel Fuentes Moreno

René Avalos Vela³

Abstract: There is relatively little information on nesting behavior of the collared trogon (Trogon collaris). In this study we describe three nests of this species and some characteristics of the nesting sites in the Sierra de Zongolica, Veracruz, Mexico.

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Lesser Woodcreepers excavate nest cavities in trees

Cockle,

Gomez,

Ferreyra

et al. 2024

Ornithology

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To understand the evolution, life-history tradeoffs, and population ecology of cavity nesters, it is critical to identify the avian lineages and circumstances in which birds excavate tree cavities. Woodcreepers (Furnariidae: Dendrocolaptinae; 56 species) are considered non-excavators dependent on existing cavities. We overturn this assumption by providing definitive evidence that the Lesser Woodcreeper (Xiphorhynchus fuscus, 23 g) is a facultative tree-cavity excavator. From 2007 to 2022 in the Atlantic forest of Misiones, Argentina, Lesser Woodcreepers nested in preexisting tree crevices (4 nests), or excavated cavities in trunks of large-diameter trees in advanced stages of decay (mean diameter: 58 cm, range: 22–121 cm, 22 nests). Nest entrances were vertically elongated and chambers were usually pocket like, excavated in the exterior of the trees (sapwood), with floors that curved along the trees’ circumference. Excavating woodcreepers pulled out elongated pieces of spongy, fibrous decayed wood, tapping only when inside cavities. Published and online photographs of nests of Xiphorhynchus species suggest that excavation may be widespread in the genus. Our observations that woodcreepers tore out elongated pieces of spongy wood (rather than hammering) are consistent with the idea that their long, thin bills are more resistant to torsion and less resistant to impact compared to the stouter bills of other excavators in Passeriformes and Piciformes. Research has tended to focus on birds with chisel-shaped bills, perforating harder sapwood to create nesting chambers in the center of heartrot-infected trees (resulting in typical woodpecker cavities, with circular floors). We hypothesize that Lesser Woodcreepers have adopted an alternative strategy, selecting large trunks with soft outer wood (sapwood), stopping their excavation radially if they reach harder wood, and then expanding the nest chamber laterally. Furnariidae may offer a useful model family for understanding ecological and evolutionary factors that influence cavity excavation. We provide a Spanish translation in Supplementary Material.

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Lesser Woodcreepers excavate nest cavities in trees

Cockle,

Gomez,

Ferreyra

et al. 2024

Ornithology

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show abstract

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Description of Collared Trogon (Trogon Collaris) Nests in the Sierra De Zongolica, Veracruz, Mexico

Abstract: There is relatively little information on nesting behavior of the collared trogon (Trogon collaris). In this study we describe three nests of this species and some characteristics of the nesting sites in the Sierra de Zongolica, Veracruz, Mexico.

Cited by 1 publication

References 5 publications

Lesser Woodcreepers excavate nest cavities in trees

Lesser Woodcreepers excavate nest cavities in trees

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