INTERSPECIFIC FEEDING BY A RED-NECKED TANAGER TANGARA CYANOCEPHALA PAIR TO VIOLACEOUS EUPHONIA EUPHONIA VIOLACEA NESTLINGS: Interspecific feeding

Arian Rayegani; Daniel A. Airola

doi:10.58843/ornneo.v37i1.1439

Authors

Arian Rayegani Rio de Janeiro, Brazil https://orcid.org/0009-0008-2558-6091
Daniel A. Airola Conservation Research and Planning, Sacramento, California, USA

DOI:

https://doi.org/10.58843/ornneo.v37i1.1439

Keywords:

Atlantic forest, interspecific feeding, nest site, non-adaptive behavior, urban forest

Abstract

Interspecific feeding, the provisioning of young of another species, is a rare, non-adaptive behavior in birds. On 22 February 2025, during a birdwatching trip to the Parque Nacional da Tijuca, in the city of Rio de Janeiro, Brazil, A. Rayegani detected a Violaceous Euphonia Euphonia violacea nest. He observed the nest for 0.5-2 h on four days over a 14-day period. On 22, 26, and 28 February 2025, both the Euphonia parents and a pair of Red-necked Tanagers Tangara cyanocephala fed the three Euphonia nestlings at the nest entrance. This non-adaptive feeding by the tanagers may have been caused by the loss of their eggs or nestlings, which triggered the transfer of their misplaced parental instincts onto the Euphonia brood. Our observation is the first report of interspecific feeding in the tropics that did not involve brood parasitism and contributes to our knowledge of this non-adaptive behavior in Neotropical birds.

References

Batisteli AF, Sarmento AM (2016) Interspecific parental care by a Rufous-collared Sparrow (Zonatrichia capensis) at a nest of a Pale-breasted Thrush (Turdus leucomelas) parasitized by a cowbird (Molothus bonariensis). Ornitología Neotropical 27: 253-257.

Belcher C, Smooker GD (1937) Birds of the colony of Trinidad and Tobago. Part VI. Ibis 14: 504–550.

Collins CT (2006) Growth and development of the Violaceous Euphonia and Palm Tanager in Trinidad. Living World 2006: 1-7

Harmáčková L (2021) Interspecific feeding in birds: a short overview. Acta Ornithologica 56: 1–14. https://doi.org/10.3161/00016454AO2021.56.1.001

Haverschmidt F (1968) Birds of Surinam. Oliver and Boyd, London, UK.

Macdonald HM, Burns KJ, Lima RD, Kirwan GM (2024) Red-necked Tanager (Tangara cyanocephala), version 1.1. In Schulenberg TS, Billerman SM, Kirwan GM (eds.) Birds of the World. Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.rentan1.01.1

Martinez D (2020) Violaceous Euphonia (Euphonia violacea), version 1.0. in Schulenberg TS (ed.) Birds of the World. Cornell Lab of Ornithology, Ithaca, NY. USA. https://doi.org/10.2173/bow.vioeup1.01

Norgaard-Olesen E (1973) Tanagers. Volume 1. Skibby-Books, Skibby, Denmark.

Segura LN, Gonzalez E, Jauregui A (2016) Unusual nest and nestling appropriation by the Eared Dove (Zenaida auriculata) Ornitología Neotropical 27: 101–104.

Shy MM (1982) Interspecific feeding among birds: a review. Journal of Field Ornithology 53: 370–393.

INTERSPECIFIC FEEDING BY A RED-NECKED TANAGER TANGARA CYANOCEPHALA PAIR TO VIOLACEOUS EUPHONIA EUPHONIA VIOLACEA NESTLINGS