Chalybura buffonii


To elaborate our model we removed uncertain localities such as 'Bogota skins', those localities with no coordinates and all records with coordinates laying down in sites with estimated elevations above 2,200 m.

The habitat suitability model generated in Maxent showed a few areas suitable in climatic terms for this species in Arauca and in the far east Amazon in the Rio Negro region. These areas are not known to be occupied by the species and were excluded from the potential distribution map of this hummingbird. Areas in the Pacific lowlands (likely suitable) were largely unpredicted and were noted as such in our maps. Otherwise, lowland areas north of the Western and Central Andes between Uraba and serrania de San Lucas possibly are in this same category. Nevertheless, they were not highlighted in any way.

Assuming that the distribution of the species may have filled the complete climatic model generated, its distribution today in remnants of forest is about 150,412 km2, which corresponds to a loss of 60 % of its potential original distribution due to deforestation. Nonetheless, this species favours edges, secondary vegetation and plantations and therefore possibly deforestation has not negatively affected greatly its populations.

Distribution of specimens according to BioMap suggest a possible area (2,412 km2) of intergradation between subspecies buffonii and micans in Central Valle del Cauca.


Regularized training gain is 1.325, training AUC is 0.924, unregularized training gain is 1.550.

Algorithm terminated after 2000 iterations (71 seconds).

The follow settings were used during the run:

596 presence records used for training.

10592 points used to determine the Maxent distribution (background points and presence points).

Environmental layers used (all continuous): bio10co bio11co bio12co bio13co bio14co bio15co bio16co bio17co bio18co bio19co bio1co bio2co bio3co bio4co bio5co bio6co bio7co bio8co bio9co

Regularization values: linear/quadratic/product: 0.050, categorical: 0.250, threshold: 1.000, hinge: 0.500

Feature types used: hinge product linear threshold quadratic

responsecurves: true

jackknife: true

maximumiterations: 2000

'Equal Training Sensitivity and Specificity' and 'Equate Entropy of Thresholded and Original Distributions' thresholds and omission rates:


21.699-8.159-Cumulative threshold

0.345-0.138-Logistic threshold

0.149-0.267-Fractional predicted area

0.149-0.032-Training omission rate