Field Notes Journal

Seasonal Analysis and Species Classification

Pied Wagtail

Model Family : Resident detectability

Summary

Pied Wagtail

Resident with summer detectability collapse

Pied Wagtail is classified as resident with summer detectability collapse. The fitted resident detectability target peaks around May and reaches its lowest point around August. The model indicates moderate baseline presence, weak spring carry-over, strong pre-summer retention, moderate summer suppression, and strong summer decay acceleration.

Confidence
Low
Fit score
0.396
Peak detectability
May
Lowest detectability
August

Seasonal wheel

Seasonal wheel for Pied Wagtail Pied Wagtail Peak: May

Calendar strip

Jan 0.26
Feb 0.26
Mar 0.34
Apr 0.63
May 0.65
Jun 0.34
Jul 0.25
Aug 0.09
Sep 0.13
Oct 0.2
Nov 0.24
Dec 0.37

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

Classification evidence

Target peak month
5
Target peak label
May
Target trough month
8
Target trough label
August
Target peak value
0.649
Target trough value
0.087
Target mean value
0.312
Target amplitude
0.562
Baseline to peak ratio
0.328
Autumn to winter weight ratio
0.056
Year end to winter weight ratio
0.399
Decay to growth ratio
1.567

Observed and Simulated Seasonal Patterns

Pied Wagtail Observed Presence, Abingdon
Pied Wagtail Observed Presence, Abingdon
Pied Wagtail Observed Totals, Abingdon
Pied Wagtail Observed Totals, Abingdon
Pied Wagtail Simulated Presence, Abingdon
Pied Wagtail Simulated Presence, Abingdon

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. Pied Wagtail. Field Notes Journal. ID FN-WL-SEASONAL. Version 2026.05.26. https://fieldnotesjournal.uk/wildlife/seasonal/abingdon/pied_wagtail.html

Dataset FN-WL-SEASONAL Author David Walker Publisher Field Notes Journal Version 2026.05.26

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