Natural History of the Threatened Bearded Screech-Owl (Megascops Barbarus) in Chiapas, Mexico
Bibliographic record
Abstract
We describe morphological measurements, breeding biology, roost-site characteristics, and diet of the endemic and threatened Bearded Screech-Owl (Megascops barbarus) in the central highlands of Chiapas, Mexico. The first nest recorded for this species was in a natural cavity of an old oak (Quercus laurina) and contained a single nestling. Four roosting sites were located, two in Clethra chiapensis (evergreen broadleaf) and two in Pinus ayacahuite (pine; mean height = 3.4 m). Fecal analysis indicated that diet was primarily insectivorous, consisting of Melononthidae (Coleoptera; 72.3%), along with a few Orthoptera (9.2%), Lepidoptera (3.1%), and Arachnida (1.5%). Data from 39 owls (24 captured and 15 skins) were used for morphology analysis. This species exhibited reversed sexual dimorphism, with females having greater mass and longer tails than males. Molting occurred during the rainy season (July to October), with the primary and secondary feathers being molted simultaneously. Subcutaneous fat was moderate to abundant in the dry season only (December to May). Maximum longevity we recorded was at least 4.17 yr. These first natural history data for the species provides preliminary information for understanding the ecological requirements of the Bearded Screech-Owl in fragmented tropical montane forest.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".