Amazilia yucatanensis - (Cabot, 1845)
Buff-bellied Hummingbird
Taxonomic Status: Accepted
Related ITIS Name(s): Amazilia yucatanensis (Cabot, 1845) (TSN 178060)
French Common Names: Ariane du Yucatan
Spanish Common Names: Colibrí Yucateco
Unique Identifier: ELEMENT_GLOBAL.2.103046
Element Code: ABNUC29130
Informal Taxonomy: Animals, Vertebrates - Birds - Other Birds
Image 11395

© Larry Master

 
Kingdom Phylum Class Order Family Genus
Animalia Craniata Aves Apodiformes Trochilidae Amazilia
Genus Size: D - Medium to large genus (21+ species)
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Concept Reference
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Concept Reference: American Ornithologists' Union (AOU). 1998. Check-list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. [as modified by subsequent supplements and corrections published in The Auk]. Also available online: http://www.aou.org/.
Concept Reference Code: B98AOU01NAUS
Name Used in Concept Reference: Amazilia yucatanensis
Taxonomic Comments: Amazilia yucatanensis is considered a superspecies with A. rutila by some authors (AOU 1998).
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 27Apr2015
Global Status Last Changed: 27Apr2015
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G5 - Secure
Reasons: Fairly large breeding range from southern Texas to Guatemala and Belize; apparently large population size; trend uncertain but probably relatively stable; no known major threats; locally detrimentally affected by extensive land clearing, but may benefit from enhanced food resources (feeders and exotic plants) in parks and gardens associated with human settlements.
Nation: United States
National Status: N3B (19Mar1997)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Louisiana (S2N), Texas (S3B)

Other Statuses

IUCN Red List Category: LC - Least concern
Convention on International Trade in Endangered Species Protection Status (CITES): Appendix II

NatureServe Global Conservation Status Factors

Range Extent: 200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Range Extent Comments: Breeding range extends from from northeastern Mexico and southern Texas southward in Gulf-Caribbean lowlands (including Yucatan Peninsula) to northern Guatemala and south-central Belize (Chavez-Ramirez and Moreno-Valdez 2015). A report of this species from Honduras apparently was a misidentified individual, possibly a hybrid rufous-tailed x cinnamon hummingbird (Howell and Webb 1995). In Texas, this species is an uncommon to locally common summer resident in the lower Rio Grande Valley, and along the coast north to Victoria County (Chavez-Ramirez and Moreno-Valdez 2015). Range extends from near sea level generally to about 1,200 meters, but up to 1,450 meters in Tamaulipas, Mexico (see Chavez-Ramirez and Moreno-Valdez 2015). In winter, the species occurs throughout most of the breeding range. During fall and winter, it exhibits movement (in low numbers) northward and northeastward to areas where breeding activity has not been recorded, including the upper Texas coast, Louisiana, Alabama, Mississippi, Florida, and North Carolina (see Chavez-Ramirez and Moreno-Valdez 2015).

Number of Occurrences:  
Number of Occurrences Comments: The number of distinct occurrences or subpopulations has not been determined using standardized criteria, but this species is represented by a large number of observation/collection sites (e.g., see GBIF database, eBird) and locations (as defined by IUCN).

Population Size: 100,000 to >1,000,000 individuals
Population Size Comments: Total adult population size is unknown but presumably exceeds 100,000. This species is at least fairly common in much of its large range.

Overall Threat Impact: Low
Overall Threat Impact Comments: No major threats are known. Clearing of brushland for intensive agriculture (Oberholser 1974) and livestock grazing probably have been locally detrimental. On the other hand, this species probably benefits from enhanced food resources (hummingbird feeders, nectar from exotic plant species) around human habitations. The net effect of land clearing and expansion of human communities in southern Texas and coastal Mexico is not known (Chavez-Ramirez and Moreno-Valdez 2015). Effects of pesticides and other contaminants are unknown.

Short-term Trend: Relatively Stable (<=10% change)
Short-term Trend Comments: Trend over the past 10 years or three generations is uncertain, but distribution and abundance probably have been relatively stable or at least not changing at a rapid rate.

Long-term Trend: Decline of <30% to increase of 25%
Long-term Trend Comments: Long-term trend is uncertain but overall distribution and abundance probably have been relatively stable or have undergone a small decline (in Mexico), with an apparent increasing trend in the United States. The species appears to be expanding its range in Texas (Chavez-Ramirez and Moreno-Valdez 2015). Christmas Bird Count data (early winter) indicate that in recent decades this species has been much more frequently detected in the United States than it was before the late1990s.

Other NatureServe Conservation Status Information

Distribution
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Global Range: (200,000-2,500,000 square km (about 80,000-1,000,000 square miles)) Breeding range extends from from northeastern Mexico and southern Texas southward in Gulf-Caribbean lowlands (including Yucatan Peninsula) to northern Guatemala and south-central Belize (Chavez-Ramirez and Moreno-Valdez 2015). A report of this species from Honduras apparently was a misidentified individual, possibly a hybrid rufous-tailed x cinnamon hummingbird (Howell and Webb 1995). In Texas, this species is an uncommon to locally common summer resident in the lower Rio Grande Valley, and along the coast north to Victoria County (Chavez-Ramirez and Moreno-Valdez 2015). Range extends from near sea level generally to about 1,200 meters, but up to 1,450 meters in Tamaulipas, Mexico (see Chavez-Ramirez and Moreno-Valdez 2015). In winter, the species occurs throughout most of the breeding range. During fall and winter, it exhibits movement (in low numbers) northward and northeastward to areas where breeding activity has not been recorded, including the upper Texas coast, Louisiana, Alabama, Mississippi, Florida, and North Carolina (see Chavez-Ramirez and Moreno-Valdez 2015).

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map
NOTE: The maps for birds represent the breeding status by state and province. In some jurisdictions, the subnational statuses for common species have not been assessed and the status is shown as not-assessed (SNR). In some jurisdictions, the subnational status refers to the status as a non-breeder; these errors will be corrected in future versions of these maps. A species is not shown in a jurisdiction if it is not known to breed in the jurisdiction or if it occurs only accidentally or casually in the jurisdiction. Thus, the species may occur in a jurisdiction as a seasonal non-breeding resident or as a migratory transient but this will not be indicated on these maps. See other maps on this web site that depict the Western Hemisphere ranges of these species at all seasons of the year.
Endemism: occurs (regularly, as a native taxon) in multiple nations

U.S. & Canada State/Province Distribution
United States LA, TX

Range Map
Note: Range depicted for New World only. The scale of the maps may cause narrow coastal ranges or ranges on small islands not to appear. Not all vagrant or small disjunct occurrences are depicted. For migratory birds, some individuals occur outside of the passage migrant range depicted. For information on how to obtain shapefiles of species ranges see our Species Mapping pages at www.natureserve.org/conservation-tools/data-maps-tools.

Range Map Compilers: NatureServe, 2002; NatureServe, 2004

Ecology & Life History
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Reproduction Comments: In Texas, 2 eggs laid March-July (mostly May-June). Nesting season in Yucatan apparently late January through at least mid-April (Johnsgard 1983).
Non-Migrant: Y
Locally Migrant: Y
Long Distance Migrant: N
Mobility and Migration Comments: This species appears to be basically nonmigratory in most of the range. Some seasonal migration occurs in the northern part of the range (see Chavez-Ramirez and Moreno-Valdez 2015). Many individuals that nest in Texas and northeastern Mexico probably migrate southward in fall and winter (Johnsgard 1983).
Palustrine Habitat(s): Riparian
Terrestrial Habitat(s): Cropland/hedgerow, Shrubland/chaparral, Suburban/orchard, Woodland - Hardwood
Habitat Comments: Habitats include open scrubby woodlands, thorn forest, riparian forest, forest edges, parks, and gardens (see Chavez-Ramirez and Moreno-Valdez 2015 for further details); tropical deciduous forest, gallery forest, secondary forest, tropical lowland evergreen forest edge (AOU 1998). Nests in small trees and bushes, 1-7 meters above ground (Chavez-Ramirez and Moreno-Valdez 2015).
Adult Food Habits: Invertivore, Nectarivore
Immature Food Habits: Invertivore, Nectarivore
Food Comments: Diet includes flower nectar and insects; these hummingbirds feed on wide variety of flowers of all colors and tube shapes (Chavez-Ramirez and Moreno-Valdez 2015); flowers used in Texas include Texas ebony, mesquite, anaqua, and giant Turk's cap (Oberholser 1974).
Adult Phenology: Diurnal
Immature Phenology: Diurnal
Length: 11 centimeters
Weight: 4 grams
Economic Attributes Not yet assessed
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Management Summary
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Stewardship Overview: No species-specific management is needed. This species would benefit from enhanced protection of wooded habitats that provide suitable nest sites and nectar resources.
Population/Occurrence Delineation
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Group Name: Hummingbirds

Use Class: Breeding
Minimum Criteria for an Occurrence: Evidence of historical breeding, or current and likely recurring breeding, at a given location, minimally a reliable observation of one or more breeding pairs in appropriate habitat. Be cautious about creating EOs for observations that may represent single breeding events outside the normal breeding distribution.
Separation Barriers: None.
Separation Distance for Unsuitable Habitat: 5 km
Separation Distance for Suitable Habitat: 5 km
Separation Justification: High potential for gene flow among populations of birds makes it difficult to circumscribe occurrences on the basis of meaningful population units without occurrences becoming too large. Hence, a moderate, standardized separation distance has been adopted for hummingbirds; it should yield occurrences that are not too spatially expansive while also accounting for the likelihood of gene flow among populations within a few kilometers of each other.
Inferred Minimum Extent of Habitat Use (when actual extent is unknown): .1 km
Date: 10Sep2004
Author: Hammerson, G., and S. Cannings

Use Class: Nonbreeding
Minimum Criteria for an Occurrence: Evidence of recurring presence of wintering individuals (including historical); and potential recurring presence at a given location, minimally a reliable observation of 25 birds in appropriate habitat (or fewer individuals for G1-G3 species). Occurrences should be locations where the species is resident for some time; it is preferable to have observations documenting presence over at least 7 days annually. Be cautious about creating EOs for observations that may represent single events.
Separation Barriers: None.
Separation Distance for Unsuitable Habitat: 5 km
Separation Distance for Suitable Habitat: 5 km
Separation Justification: Separation distance somewhat arbitrary; a compromise between the often small home ranges of these birds, their great mobility, and the need for occurrences of reasonable size.
Inferred Minimum Extent of Habitat Use (when actual extent is unknown): .1 km
Date: 10Sep2004
Author: Cannings, S., and G. Hammerson
Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 27Apr2015
Element Ecology & Life History Edition Date: 27Apr2015
Element Ecology & Life History Author(s): Hammerson, G.

Zoological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).

References
Help
  • Allen, C. R., S. Demarais, and R. S. Lutz. 1994. Red imported fire ant impact on wildlife: an overview. The Texas Journal of Science 46(1):51-59.

  • American Ornithologists' Union (AOU). 1983. Check-list of North American Birds, 6th edition. Allen Press, Inc., Lawrence, Kansas. 877 pp.

  • American Ornithologists' Union (AOU). 1998. Check-list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. [as modified by subsequent supplements and corrections published in The Auk]. Also available online: http://www.aou.org/.

  • Baltosser, W. H., and P. E. Scott. 1996. Costa's Hummingbird (CALYPTE COSTAE). No. 251 IN A. Poole and F. Gill, editors, The birds of North America. The Academy of Natural Sciences, Philadelphia, PA, and The Amerian Ornithologists' Union, Washington, DC. 32pp.

  • BirdLife International. 2004b. Threatened birds of the world 2004. CD ROM. BirdLife International, Cambridge, UK.

  • Bleiweiss, R., J. A. W. Kirsch, and J. C. Matheus. 1994. DNA-DNA hybridization evidence for subfamily structure among hummingbirds. Auk 111:8-19.

  • Carter, M., C. Hunter, D. Pashley, and D. Petit. 1998. The Watch List. Bird Conservation, Summer 1998:10.

  • Chavez-Ramirez, F., and A. Moreno-Valdez. 2015. Buff-bellied hummingbird (Amazilia yucatanensis). The Birds of North America Online (A. Poole, editor). Ithaca: Cornell Lab of Ornithology. Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/388. doi:10.2173/bna.388

  • Howell, S. N. G., and S. Webb. 1995. A guide to the birds of Mexico and northern Central America. Oxford University Press, Oxford, UK.

  • Johnsgard, P. A. 1983c. Hummingbirds of North America. Smithsonian Institution Press, Washington, D.C. 304 pp.

  • Lowery, George H. 1974. The Birds of Louisiana. LSU Press. 651pp.

  • Montgomerie, R. D. 1979. Energetics of foraging and competition in some tropcial hummingbirds. Ph.D. dissertation, McGill University, Montreal, Quebec.

  • National Geographic Society (NGS). 1983. Field guide to the birds of North America. National Geographic Society, Washington, DC.

  • Oberholser, H.C. 1974. The bird life of Texas. 2 vols. Univ. of Texas Press, Austin.

  • Parker III, T. A., D. F. Stotz, and J. W. Fitzpatrick. 1996. Ecological and distributional databases for neotropical birds. The University of Chicago Press, Chicago.

  • Poole, A. F. and F. B. Gill. 1992. The birds of North America. The American Ornithologists' Union, Washington, D.C. and The Academy of Natural Sciences, Philadelphia, PA.

  • Powers, D. R., and S. M. Wethington. 1999. Broad-billed Hummingbird (CYNANTHUS LATIROSTRIS). No. 430 IN A. Poole and F. Gill, editors. The birds of North America. The Birds of North America, Inc., Philadelphia, PA. 20pp.

  • Puebla-Olivares, F., E. Rodríguez-Ayala, B. E. Hernández-Baños, and A. G. Navarro S. 2002. Status and conservation of the avifauna of the Yaxchilán Natural Monument, Chiapas, Mexico. Ornitologia Neotropical 13:381-396.

  • Rappole, J.H., and G.W. Blacklock. 1994. Birds of Texas: A field guide. Texas A&M University Press, College Station.

  • Terres, J. K. 1980. The Audubon Society encyclopedia of North American birds. Alfred A. Knopf, New York.

  • Williamson, S. L. 2000. Blue-throated hummingbird (Lampornis clemenciae). No. 531 in A. Poole and F. Gill, editors. The birds of North America. The Birds of North America, Inc., Philadelphia, PA. 16pp.

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