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Hummingbird Survival

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Hummingbirds are the second most diverse family of birds with about 340 known species. These little birds can travel vast distances; around 30 percent of hummingbird species migrate between the USA, Canada and Mexico. We do not know how migration is triggered. They are known to only reside in the western hemisphere.
Hummingbirds have received relatively little attention from a conservation aspect, especially considering their commonplace and popularity with people.

Scientists dilemma: unlike many other avian families, there are fundamental gaps in recorded scientific information of Trochilidae's present and past that makes it difficult to predict risks to the viability of future hummingbird populations. This is partly a result of the fact that hummingbird populations require unique monitoring techniques due to their specialized ecology and physiology. Hummingbirds have unique attributes and are tiny, resulting in other landbird conservation efforts to fail to adequately address hummingbird needs. Their small size, rapid movement, high-pitched vocalizations, unique flight tendencies, and other features make them a uniquely difficult bird to study.

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They are specialized for this nectar diet with their morphological, ecological, and physiological adaptations. Their extremely high metabolism rates make them particularly dependent on nectar.
The development of hummingbird movement and distribution patterns has likely evolved according to the distribution and phenology of nectar resources (Rappole and Schuchmann 2003 FIND). The timing of these blooms and the distribution of hummingbird species must occur at the same time for survival of the bird.
In turn, about 130 plant species are pollinated by hummingbirds in Western USA. Native plants that often occur in early successional stages of forest regrowth are often pollinated by

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