Breeding biology and nesting success of the endemic Black-cheeked Gnateater (<i>Conopophaga melanops)</i>

Studer, Anita; Sousa, Marcelo Cardoso de; Barcena-Goyena, Begoña

doi:10.1080/01650521.2019.1618532

Cited by 7 publications

(39 citation statements)

References 21 publications

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“…recorded here for C. roberti (40.9%) was nevertheless much higher than those found in C. melanops byLima & Roper (2009), who registered a success rate of 22%, andStuder et al (2019), who recorded a rate of 20%. Depredation and abandoning the nest are two of the principal factors that determine the low clutch success rates in most bird species from the Neotropical region(Marini et al 2009, Nóbrega & Pinho 2010.…”

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confidence: 64%

“…In general, the reproductive parameters of C. roberti are similar to those of other species of the genus Conopophaga. However, the predation nest rate of C. roberti (45,5%) were lower than that observed for C. melanops (64,9%), for example (Studer et al 2019). Bodrati & Di Sallo (2020) also recorded only one successful nest from the five sites monitored in a study of Rufous Gnateater C. lineata.…”

Section: Discussionmentioning

confidence: 60%

“…Stenzel & Souza (2014) observed that most of the C. melanops nestlings monitored in remnants of the Atlantic Forest in the Rio de Janeiro Botanical Garden remained in the nest for 15 days, although in one case, a fledgling abandoned the nest after 14 days. In other studies of C. melanops, the nestlings remained in the nest for between 13 and 18 days (Straube 1989, Alves et al 2002, Studer et al 2019. This variation in nestling period may be related to climatic and latitudinal factors within the ample geographic range of the species.…”

Section: Discussionmentioning

confidence: 88%

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Breeding biology of Hooded Gnateater Conopophaga roberti Hellmayr, 1905 (Aves: Conopophagidae)

2022

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The Hooded Gnateater Conopophaga roberti Hellmayr, 1905 is an insectivorous understory passeriform with discrete behavior, whose reproductive attributes are poorly-known. In the present study, we describe the reproductive biology of the species and the growth pattern of the nestlings, based on observations conducted in remnants of the Cerrado savanna in eastern Maranhão state, in Brazil. The nests were identified during active searches conducted between June, 2018 and March, 2021. A total of 22 nests were found over the course of three breeding seasons. The cup-shaped nests were supported by small branches and were constructed at a mean height of 40.6 ± 16.1 cm (N = 21) above the ground. The nests were 23.1 ± 3.9 cm in length and 14.1 ± 1.6 cm in width (N = 21). The eggs were beige in color, with irregular brown mottling only at the rounded end of the egg, which had a mean length of 21.3 ± 0.8 mm, width of 17.2 ± 0.8 mm, and mass of 3.1 ± 0.1 g (N = 23). Hatchlings are completely naked and weigh 3.1 ± 0.2 g (N = 7), and when they abandon the nest, they have yet to reach full adult size, with the total length being 65.4% of that of the adult, the wing, 65.4%, the head, 73.9%, the culmen, 74.2%, the body mass, 73.3%, and the tarsus, 89.0% that of the adult. The growth curves are sigmoidal and all the coefficients of determination are at least 0.96, with the body length having the highest value (R2 = 0.98). During the breeding season, the adult pair emitted alarm calls constantly when observers were in the vicinity of the nest. On a number of occasions, members of the breeding pair were observed moving away from the nest as it was approached by observers, while engaging in broken-wing display. The nest architecture, the color of the eggs, and the behaviors presented by this gnateater were similar to those described for other Conopophaga. With this work we contributed to improve the knowledge on the breeding behavior of this poorly know group of understory insectivorous birds.

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confidence: 64%

Section: Discussionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 88%

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Breeding biology of Hooded Gnateater Conopophaga roberti Hellmayr, 1905 (Aves: Conopophagidae)

2022

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“…The F. mitus predation record at Núcleo Curucutu of PESM occurred within the known reproductive period of Black-cheeked Gnateaters in Brazil (August to December; Stenzel & Souza 2014, Studer et al 2019. The captured female had an intermediate incubation patch (stage 2), indicating that she possibly had eggs or small chicks in the nest, which may suggest that the tree frog was to serve as food for the chick(s).…”

Section: Black-cheeked Gnateater (Conopophaga Melanops Conopophagidae...mentioning

confidence: 93%

“…Moreover, there is one report of predation on a small anuran (Willis et al 1983). Black -cheeked Gnateaters occur in a narrow strip of Atlantic Forest in eastern Brazil, making them endemic to both the biome and the country (Sick 1997, Vale et al 2018, and are reported to feed exclusively on arthropods (Alves & Duarte 1996, Whitney 2003, Studer et al 2019.…”

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confidence: 99%

Black-Cheeked Gnateater (Conopophaga Melanops) (Aves: Conopophagidae): A Predator of Small Frogs and Lizards in the Atlantic Forest

Schunck¹,

Melo

Malagoli

2022

Ornitol. Neotrop.

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The Conopophagidae family has only one report of predation of small vertebrates, being an anuran observed for the genus Conopophaga. Here, we present a record of predation on a small anuran amphibian by Conopophaga melanops. The record was made in 2008 in a Southeast Brazil. A recently dead individual of Fritziana mitus, with several lesions on its body, was observed next to an adult female of C. melanops captured in a mist net. We found only two records of predation of small vertebrates by C. melanops, being an anuran and a lizard. The three available records occurred during the reproductive period of C. melanops, indicating that the prey may serve as a resource to feed the young. This type of behavior, as well as the predator-prey relationship, should be better investigated in the field, especially in the Atlantic Forest, region with a high bird and frog diversity.

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Nesting behavior of the Chestnut-crowned Gnateater,Conopophaga castaneiceps(Aves: Conopophagidae)

Londoño

2022

Journal of Natural History

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Breeding biology and nesting success of the endemic Black-cheeked Gnateater (Conopophaga melanops)

Cited by 7 publications

References 21 publications

Breeding biology of Hooded Gnateater Conopophaga roberti Hellmayr, 1905 (Aves: Conopophagidae)

Breeding biology of Hooded Gnateater Conopophaga roberti Hellmayr, 1905 (Aves: Conopophagidae)

Black-Cheeked Gnateater (Conopophaga Melanops) (Aves: Conopophagidae): A Predator of Small Frogs and Lizards in the Atlantic Forest

Nesting behavior of the Chestnut-crowned Gnateater,Conopophaga castaneiceps(Aves: Conopophagidae)

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