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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Cambridge University Press; 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 leucotiis hummingbird Eugenes fulgens or the green violetear hummingbird Colibri thalassinus on any territory size.

Three more models with lower AIC values included the hylochwris of intruder type, and the interaction between territory size and intruder type, and the interaction between size and quality of territory Table 1. Residency effects in animal contests. On the other hand, in the event of intruders belonging to the same species, they would feed successfully a few times, but then be chased and expelled without having confronted the resident.

Hylocharis leucotis (White-eared Hummingbird) – Avibase

Habitat Pine—oak forest, pine—evergreen forest, clearings, at — m. Probability of victory of resident male white-eared hummingbirds in relationship to the size area of the territory and the identity of the intruders.

This result suggests that resident birds were less able to detect conspecific intruders as territory size increased. The magnificent hummingbird leucotid the green violetear hummingbird behave mainly as trapliners V. Your sightings No sightings Add to a lifelist: Testing hypotheses of territorial dominance.


Each circle illustrates whether a conspecific or heterospecific intruder was expelled from the territory without 0 or allowing 1 it to feed successful intrusion.

Discussion The male white-eared hummingbirds H. Blackwell Scientific Publications; However, an increase in hylocjaris value can cause an increased intrusion rate i. Differences in the success rate of defense against intruders of different body sizes can be explained by 1 the size asymmetries among contenders and 2 detectability of intruders in relation to the size of the territory. Year-round Migration Breeding Non-Breeding.

Lara Lara C.

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After completing the marking process of the individuals, we were able to identify and monitor 20 territories belonging to adult male white-eared hummingbirds Hylocharis leucotis. Residents were more likely to chase conspecific than heterospecific intruders.

Mountains of se Arizona and n Mexico Hylocharis leucotis pygmaea: Thus, asymmetries in body size among contenders, but not territory leucots, affected the probability of an owner chasing an intruder. The only species that establishes and defends feeding territories during long periods of time weeks through winter in the NPEC is the white-eared hummingbird.

Received May 15; Accepted Sep National Center for Biotechnology InformationU.

White-eared hummingbird

The flexibility observed in contest tactics suggests that, even though the first models provide useful information, these tactics are not fixed but are socially plastic instead and they can be adjusted to specific circumstances.

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These are territorial hummingbirds spend most of their time at the lower and middle levels of the forest, where they are leucoris common near banks of low flowers. In other projects Wikimedia Commons Wikispecies.


However, in our study we found that in spite of their size the smallest of the three species in the study sitethe white-eared hylochais establishes and defends food territories, from both conspecific and heterospecific individuals. Organization of a tropical nectar feeding bird guild in a variable environment. Due to the size and the vegetation density of the territories, the observations were done from different points, at a distance of approximately 10 meters from it. None of the three principal hypothesizes formulated to explain the result of the contests can explain the territorial behavior by themselves.

For captures, we used 4—5 mist nets that were 6 and 12 m long which remained open from Age, coloration and dominance in nonbreeding hummingbirds: In an evolutionary context, these interactions still require additional research.

Interference asymmetries among age-sex classes of rufous hummingbirds during migratory stopovers. 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. Table 1 Summary of logistic models describing the probability that an intruder was A pursued by the resident male or B performed a successful intrusion in relation to territory size m 2territory quality number of flowers and intruder identity conspecific and heterospecific.

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