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White-eared Hummingbird cm; male c. 3·6 g, female c. 3·2 g. Male has straight bill, red, tipped black; forehead glittering violet, white. Hylocharis leucotis leucotis: Highland pine forests of central and s Mexico to Guatemala White-eared Hummingbird (Hylocharis leucotis) [version 1] American. Click here for more information about the Red List categories and criteria. Justification of Red List category. This species has a very large range, and hence does.

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Although each territory was evaluated only during two consecutive days, some of the studied owners remained defending their feeding territories for several weeks. Models ranked in increasing order of AIC values.

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Behavioral Ecology and Sociobiology. Our results showed that the identity of the intruder and the size and quality of the territory determined leucotiis result of the contests, but not the intensity of defense.

Search Avibase search Browse by families. His throat is a metallic turquoise green. Each circle illustrates whether a conspecific or heterospecific intruder was expelled from the territory without 0 or allowing 1 it to feed successful intrusion. Since there can be more than one predictor affecting the probability that a resident wins contests against the intruders, we generated various generalized models logistic models involving a logit link and binomial error distribution describing the probabilities of victory for each recorded individual resident.

Improved methods for color-marking hummingbirds. The obtained models showed that intruder type is the best predictor of whether an intruder is chased or not Table 1while the evaluated characteristics of the defended territory had no significant effect Table 1. Hyolcharis Wikipedia, the free encyclopedia.

The larger-sized species have higher energetic requirements, reflected in typical movement patterns to look for resources within different habitats hylkcharis or trapliner Des Granges, However, residents of large territories with a high number of open flowers will tend to invest more by chasing and avoiding successful intrusions in order to exclude larger body size intruders i.


When the individuals of the larger-sized species entered a territory, the resident would expel them by chasing and vocalizing during a few seconds until the larger species would finally take over hylocgaris use the flowers inside the territory.

A montane hummingbird territorial system in Oaxaca, Mexico. The size and quality of the territory were related to the probability that the resident would allow the use of flowers by the intruder. White-eared Hummingbird is primarily resident, but most individuals of the northernmost populations move south after breeding, and southern populations may have seasonal altitudinal movements.

Twenty white-eared male adult hummingbird territories were monitored during a winter season, recording the territorial behavior of the resident against intruding hummingbirds.

Hylocharis leucotis (White-eared Hummingbird) – Avibase

As it has been mentioned, the particular dependence on floral nectar as a primary food source, combined with the characteristic distribution pattern of the plants that provide it, causes hylochais in hummingbirds to be a fundamental structuring force of their communities.

Resident-intruder asymmetries We registered the behavior of the territory residents over h, obtaining intrusive events of which, were conspecific males and femalesand 87 were heterospecific Eugenes leucoris and Colibri thalassinus.

This page was last edited on 14 Marchat We adjusted the models with different combinations of the predictor variables intruder type and two continuous variables included as covariates: On hlyocharis other hand, in interspecific interactions against individuals of E.

Only members are able to post public comments. On the contrary, the model including territory size interacting with intruder type showed strong support to explain whether a resident avoided or not successful intrusions Table 1 ; Fig. Hylocharis leucotisHummingbirds, Non-correlated asymmetry, Contest asymmetries, Prior residency, Territoriality.


Closely related to B. White-eared Hummingbird Hylocharis leucotis Vieillot, In an evolutionary context, these interactions still require additional research.

Caught individuals were identified, sexed, weighed, and measured. The bill of the male is straight and very slender.

These markers were then adhered to the back of the individuals with a quick-drying, non-toxic glue Kola Loka, E. The vegetation in the study area is a mosaic of a fir Abies religiosapine forest Pinus patulaP. Kapoor Kapoor JA.

Lara Lara C. Moreover, the only previously related study confirmed that male adults of Calypte anna and Archilochus alexandri always win their territory contests against juveniles. To achieve this goal, we followed the established territories of males and analyzed the role lecotis prior-residence in the result of territory conflict against conspecific and heterospecific intruders. This work constitutes partial fulfillment of V.

Lrucotis, to our knowledge information about the possible role of residence status against territory intruders has not been incorporated into the study of hummingbirds. We generated models with interactions between factors to evaluate if the size areaquality number of flowersand intruder type affected the probability that the territorial resident would win the contests by chasing intruders or avoiding successful intrusions.

The identity of the intruder was not enough to expel the owners from their territories. Blackwell Scientific Publications; Click here for additional data file.