Field Notes Journal

Seasonal Analysis and Species Classification

Oystercatcher

Model Family : Seasonal presence

Summary

Oystercatcher

Narrow early spring seasonal presence

Oystercatcher is classified as narrow early spring seasonal presence. The fitted seasonal window runs from about February to April, with a early spring peak around March. The season is narrow, with a sharp active window, strong post-peak decline, and strong off-season suppression.

Confidence
High
Fit score
0.007
Peak
March
Season
February–April

Seasonal wheel

Seasonal wheel for Oystercatcher Oystercatcher Peak: March

Calendar strip

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Highlighted months indicate stronger modelled presence or detectability. A ring marks the fitted peak; a hollow mark indicates the trough where available.

Classification evidence

Season start month
2.43
Season end month
4.27
Forcing peak month
3.3
Season width months
1.84
Season midpoint month
3.35
Season start label
February
Season end label
April
Forcing peak label
March

Observed and Simulated Seasonal Patterns

Oystercatcher Observed Presence, Thrupp Lake
Oystercatcher Observed Presence, Thrupp Lake
Oystercatcher Observed Totals, Thrupp Lake
Oystercatcher Observed Totals, Thrupp Lake
Oystercatcher Simulated Presence, Thrupp Lake
Oystercatcher Simulated Presence, Thrupp Lake

Cite this dataset

You are welcome to reuse or reproduce this material under the terms of the Creative Commons CC BY 4.0 licence but please cite it using the reference below, include a link to the licence, and indicate if any changes were made.

Walker, David. Oystercatcher. Field Notes Journal. ID FN-WL-SEASONAL. Version 2026.05.26. https://fieldnotesjournal.uk/wildlife/seasonal/thrupp_lake/oystercatcher.html

Dataset FN-WL-SEASONAL Author David Walker Publisher Field Notes Journal Version 2026.05.26
Reference: Walker, David. Oystercatcher. Field Notes Journal. ID FN-WL-SEASONAL. Version 2026.05.26.

BibTeX 
@dataset{fn_wl_seasonal,
  author = {Walker, David},
  title = {Oystercatcher},
  year = {2026},
  publisher = {Field Notes Journal},
  version = {2026.05.26},
  url = {https://fieldnotesjournal.uk/wildlife/seasonal/thrupp_lake/oystercatcher.html}
}