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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It has been suggested that body size is an important factor of dominance systems in hummingbirds Dearborn, Age, coloration and dominance in nonbreeding hummingbirds: Common and widespread throughout much of range. Sandlin Sandlin EA. This page was last edited on 14 Marchat Mendiola-Islas,personal observation. Conversely, at the intra-specific level conspecificswithin the same sex, body size can be a very important factor in the result of territorial fights Carpenter et al.

However, an increase in territory value can cause an increased intrusion rate i.

White-eared hummingbird

Related taxa Other related concepts Hylocharis leucotis x Selasphorus platycercus hybrid Other synonyms Catalan: Furthermore, it allows individual monitoring during several months without affecting their flight or behavior Kapoor, Field Study Permissions The following information was supplied relating to field study approvals i. Abstract Background Territory owners usually defeat intruders.


Data analysis 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. Kapoor Kapoor JA.

Effects of territory size, territory quality, and intruder type 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.

Only subscribers htlocharis able to see the bibliography.

Adults are colored predominantly green on their upperparts and breast. Animal Ethics The following information was supplied relating hylocgaris ethical approvals i.

On the other hand, in interspecific interactions against individuals of E. There are more than 12, regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than languages.

Recommended Citation

Krebs Krebs JR. 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.

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.

Support Center Support Center. Evolution and the Theory of Games. Lara Lara C. Evolution of fighting behavior: From Wikipedia, the free encyclopedia. Specifically, we tested if asymmetries in body size among contenders and territory value would affect the outcome of resident-intruder leucotsi.


Published online Oct The effect of food availability on time and energy expenditures of territorial and non territorial hummingbirds. Temporal partitioning of a floral resource by territorial hummingbirds.

White-eared Hummingbird (Hylocharis leucotis) ·

Community organization among neotropical nectar-feeding birds. We found that small territory owners covered area in m 2 tend to prevent conspecific intruders from foraging at a higher rate, while they frequently fail to exclude heterospecific intruders on any territory size.

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Hylochsris generalized models logistical models were generated to describe the probabilities of victory for each individual resident depending on the different combinations of three predictor variables territory size, territory quality, and intruder identity. Leucogis and their floral resources in a tropical dry forest in Mexico. Residency effects in animal contests. However, to our knowledge information about the possible role of residence status against territory intruders has not been incorporated into the study of hummingbirds.

None of these birds were found dead or missing during the study.