Field Notes Journal

Seasonal Analysis and Species Classification

Magpie

Model Family : Resident detectability

Magpie (Pica pica), Abingdon, UK
Magpie (Pica pica), Abingdon, UK David Walker, Field Notes Journal ( CC BY 4.0 )

Summary

Magpie

Resident with spring persistence and summer suppression

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

Confidence
Low
Fit score
0.43
Peak detectability
February
Lowest detectability
August

Seasonal wheel

Seasonal wheel for Magpie Magpie Peak: February

Calendar strip

Jan 1.06
Feb 1.17
Mar 1.0
Apr 0.89
May 0.88
Jun 0.88
Jul 0.84
Aug 0.5
Sep 0.53
Oct 0.62
Nov 0.67
Dec 0.81

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
2
Target peak label
February
Target trough month
8
Target trough label
August
Target peak value
1.165
Target trough value
0.5
Target mean value
0.821
Target amplitude
0.665
Baseline to peak ratio
0.548
Autumn to winter weight ratio
0.102
Year end to winter weight ratio
0.527
Decay to growth ratio
1.249

Observed and Simulated Seasonal Patterns

Magpie Observed Presence, Abingdon
Magpie Observed Presence, Abingdon
Magpie Observed Totals, Abingdon
Magpie Observed Totals, Abingdon
Magpie Simulated Presence, Abingdon
Magpie 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. Magpie. Field Notes Journal. ID FN-WL-SEASONAL. Version 2026.05.21. https://fieldnotesjournal.uk/wildlife/seasonal/abingdon/magpie.html

Dataset FN-WL-SEASONAL Author David Walker Publisher Field Notes Journal Version 2026.05.21
Reference: Walker, David. Magpie. Field Notes Journal. ID FN-WL-SEASONAL. Version 2026.05.21.

BibTeX 
@dataset{fn_wl_seasonal,
  author = {Walker, David},
  title = {Magpie},
  year = {2026},
  publisher = {Field Notes Journal},
  version = {2026.05.21},
  url = {https://fieldnotesjournal.uk/wildlife/seasonal/abingdon/magpie.html}
}