Description
Measure signed calendar days between a supplied nest entry and last observation.
Conservation observations depend on sampling effort, specimen provenance, spatial precision and the population being assessed. Survivors among assessed plants differ from survivors among all planted plants. Coordinate rounding or cell assignment changes a display location without guaranteeing protection, and a time-gap threshold does not establish independent observations.
Measure signed calendar days between a supplied nest entry and last observation.
When to use this tool
Use Nest Monitoring Exposure Days Entry when you already have entryDate, lastObservationDate and need to measure signed calendar days between a supplied nest entry and last observation.
How to use the tool and how it works
- Enter entryDate, lastObservationDate. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read signedCalendarDays. Use the output convention below.
Parse real UTC dates; return lastObservationDate-entryDate in days.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| entryDate | Entry Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| lastObservationDate | Last Observation Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| signedCalendarDays | Signed Calendar Days | Required. Safe integer. |
{
"input": {
"entryDate": "2026-10-28",
"lastObservationDate": "2026-11-01"
},
"output": {
"signedCalendarDays": 4
}
}Limitations and assumptions
- Negative gaps are retained. This is not automatically a nest-survival exposure estimator, active-nest duration, observation completeness or biological outcome.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Alternative or Complementary methods
Review original field records, specimens, survey design and location-access requirements. Use the complete ecological and spatial method for population or protection decisions; local rates, interval flags and source-qualified labels do not supply it.
References
Similar or alternative tools
- Camera Trap Deployment Gap Exposure
Subtract supplied inactive time from a deployment duration.
- Protected Site Public Coordinate Rounding
Round a supplied public-coordinate number to a chosen decimal-place count.