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.

Author: Migore Sar
Country: Cyprus
Language: English (Spanish)
Genre: History
Published (Last): 16 April 2007
Pages: 204
PDF File Size: 8.39 Mb
ePub File Size: 4.35 Mb
ISBN: 572-8-77971-149-4
Downloads: 33000
Price: Free* [*Free Regsitration Required]
Uploader: Mok

White-eared Hummingbird occupies montane pine-oak, oak, and pine-evergreen forests from the extreme southwestern United States south to Nicaragua. Descriptive notes 9—10 cm; male c.

Their metallic chipping song also helps identify them from similar species. This prediction is supported by our results because larger sized intruders heterospecifics had a lower rate of exclusion than similar sized intruders conspecifics regardless of the territory quality.

Results In general, small and low quality territory owners tend to prevent conspecific intruders from foraging at a higher rate, while they frequently fail to exclude heterospecific intruders such as the magnificent hummingbird Eugenes fulgens or the green violetear hummingbird Colibri hylocharia on any territory size.

Abstract Background Territory owners usually defeat intruders.

Hylocharis leucotis (White-eared Hummingbird) – Avibase

In the event of an owner not chasing an intruder, it would remain perched emitting vocalizations. Field Study Permissions The following information was supplied relating to field study approvals i. Specifically, we tested if asymmetries in body size among contenders and territory value would affect the outcome of resident-intruder conflicts.

The observation period was eight hours for each territory. These aspects are the main factors to determine the result of the contests during the territorial defense of these hummingbird species. The identity of the intruder was not enough to expel the owners from their territories. 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 fulgens and Colibri thalassinus.


Discussion The male white-eared hummingbirds H.

Click here for additional data file. Handbook of the Birds of the World Alive. From hawks and doves to self-consistent games of territorial behavior. Leucoyis individuals were observed defending feeding territories during various days after they were marked.

Interestingly, the outcome of disputes among similarly sized contenders would vary as the territory size increased. If the cost of defending the territory exceeds its value, the resident must eventually leave Smith, You must be logged in to view your sighting details.

Recommended Citation

Hummingbirds Trochilidae have been a model system for the study of territorial behavior because of their specialized nectarivorous habit, their small territories and their high energetic demands, in addition to the feasibility of quantifying and manipulating their food sources Dearborn, 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.

The most prominent feature is the white eyestripe found in both males and females. Thus, asymmetries in body size among contenders, but not territory value, affected the probability of an owner chasing an intruder.

Residents were more likely to chase conspecific than heterospecific intruders. The field research reported here was performed with minimal bird manipulation and followed the Guidelines for the Use of Wild Birds in Research by the North American Ornithological Council. White-eared Hummingbird Hylocharis leucotis Vieillot, Bird checklists – taxonomy – distribution – maps – links.

Asymmetric territorial contests in the European robin: From Wikipedia, the free encyclopedia. It is red in coloration, and shows a black tip.


Status and conservation Not globally threatened. Interference asymmetries among age-sex classes of rufous hummingbirds during migratory stopovers. Avibase checklists Search Avibase search Browse by families Contribute There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages.

Although this rule prevents potentially harmful fights, alternative explanations suggest that its stability depends on asymmetries in fighting ability or resource value. An Introduction to Behavioural Ecology. International Union for Conservation of Nature. Avibase is also available in the following languages: His throat is a metallic turquoise green.

Published online Oct Krebs Krebs JR. Tobias Tobias J. The larger-sized species have higher energetic requirements, reflected in typical movement patterns to look for resources within different habitats marauder or trapliner Des Granges, Kapoor Kapoor JA.

Three more models with lower AIC values included the effect of intruder type, and the interaction between territory size and intruder type, and the interaction between size and quality of territory Table 1. 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. 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.

Related taxa Other related concepts Hylocharis leucotis x Selasphorus platycercus hybrid Other synonyms Catalan: Additional Information and Declarations Competing Interests The authors declare that they have no competing interests. Influence of asymmetries in resource quality and age on aggression and dominance in bylocharis hummingbirds.

Ewald Ewald PW.