Nocturnal Provisioning by Swainson's Thrush
Bibliographic record
Abstract
We studied Swainson's Thrush (Catharus ustulatus) at two study areas of different latitudes to examine if parents provisioned their nestlings beyond daylight hours. We viewed 591 hrs of video from 37 nests. All nests were provisioned outside the dawn to dusk period but provisioning also continued through the night at the northern site. Night provisioners made an average (± SE) of 1.55 ± 0.18 fewer provisioning trips/hr during the pre-dawn to late evening periods compared to non-night provisioners. Night provisioners compensated with two additional trips/hr during the post-dusk period and 2.11 (95% CI: 1.61–2.77) trips/hr during the night period. Night provisioners did not experience improved reproductive success, which supports our conclusion that night provisioning was compensatory rather than ‘bonus’ energy. Nocturnal provisioning was best explained by increased day length, which corresponded to increased light levels during the night period that enabled parents to navigate and locate food. Swainson's Thrush extend a given provisioning effort over more hours as light levels permit rather than increasing energy delivery to their nestlings, which may provide time and energy for other activities.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 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 | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".