Zoological Studies

Vol. 61, 2022

(update: 2022.3.18)

Seasonal Distribution of the Broad-Tailed Hummingbird (Selasphorus platycercus): A Climatic Approach

Norma Hernández-Hernández1, Claudio Mota-Vargas1, Carlos Lara2, and Octavio Rojas-Soto1,*

1Laboratorio de Bioclimatología, Instituto de Ecología A.C. Carretera Antigua a Coatepec 351, El Haya, 91073 Xalapa, Veracruz, México. *Correspondence: E-mail: octavio.rojas@inecol.mx (Rojas-Soto).
E-mail: norma.alicia.hh@gmail.com (Hernández-Hernández); claudio.mota@inecol.mx (Mota-Vargas)
2Centro de Investigación en Ciencias Biológicas, Universidad Autónoma de Tlaxcala, Km. 10.5 Autopista Tlaxcala-San Martín Texmelucan, San Felipe Ixtacuixtla, Tlaxcala 90120, México. E-mail: carlos.lara.rodriguez@gmail.com (Lara)

Received 4 September 2021 / Accepted 11 March 2022
Communicated by Chih-Ming Hung

The seasonal movements of birds are a phenomenon that has historically been of interest in ecology and biogeography. Despite this, information on how environmental conditions influence migratory behavior and its regulation is still scarce. In this work, we study the Broad-Tailed hummingbird Selasphorus platycercus from an analysis of its populations through longitudinal and latitudinal gradients. We use the frequencies of monthly presence records throughout the annual cycle to identify the breeding areas (corresponding to the summer months), of winter presence (corresponding to the winter months), and annual residence (presence records throughout the year). Subsequently, we use ecological niche models to reconstruct the potential distribution of the summer and winter niches by correlating the climates of each season with the corresponding records. We evaluate the species’ climatic preferences between the breeding and winter seasons by transferring the niches from each season to the opposite and by their capacity to inter-predict records between seasons. In addition, we quantify the overlap between the summer and winter niches using a niche similarity analysis. Geographically, we see a clear seasonal turnover pattern along a north-south gradient and records throughout the year (resident populations) in the south-central region of its distribution. We observed a low inter-prediction of records between seasons. Together with the similarity analysis, we suggest that the species is a niche-switching (i.e., with different seasonal niches). We identified three seasonal migration patterns among the species’ populations: long-distance migratory, short-distance summer migrant, and resident. Our findings suggest that the different migration patterns in this species' populations all over its distribution can be explained through seasonal climatic variations throughout the year.

Key words: Environmental similarity, Migration, Seasonal climate niche, Seasonal turnover, Temporal ecology.

Citation: Hernández-Hernández N, Mota-Vargas C, Lara C, Rojas-Soto O. 2022. Seasonal distribution of the broad-tailed hummingbird (Selasphorus platycercus): a climatic approach. Zool Stud 61:23.

Supplementary materials: Appendix 1