Field Notes Journal

Seasonal Analysis and Species Classification

Coot

Model Family : Resident detectability

Coot (Fulica atra), Farmoor Reservoir, UK
Coot (Fulica atra), Farmoor Reservoir, UK David Walker, Field Notes Journal ( CC BY 4.0 )
Coot (Fulica atra), Farmoor Reservoir, UK
Coot (Fulica atra), Farmoor Reservoir, UK David Walker, Field Notes Journal ( CC BY 4.0 )
Coot (Fulica atra), Farmoor Reservoir, UK
Coot (Fulica atra), Farmoor Reservoir, UK David Walker, Field Notes Journal ( CC BY 4.0 )
Coot (Fulica atra), Farmoor Reservoir, UK
Coot (Fulica atra), Farmoor Reservoir, UK David Walker, Field Notes Journal ( CC BY 4.0 )

Summary

Coot

Resident with summer detectability collapse

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

Confidence
High
Fit score
0.2
Peak detectability
April
Lowest detectability
October

Seasonal wheel

Seasonal wheel for Coot Coot Peak: April

Calendar strip

Jan 0.11
Feb 0.2
Mar 0.49
Apr 0.62
May 0.37
Jun 0.15
Jul 0.09
Aug 0.05
Sep 0.02
Oct 0.0
Nov 0.03
Dec 0.24

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
4
Target peak label
April
Target trough month
10
Target trough label
October
Target peak value
0.618
Target trough value
0.0
Target mean value
0.197
Target amplitude
0.618
Baseline to peak ratio
0.087
Autumn to winter weight ratio
0.051
Year end to winter weight ratio
0.425
Decay to growth ratio
1.385

Observed and Simulated Seasonal Patterns

Coot Observed Presence, Thrupp Lake
Coot Observed Presence, Thrupp Lake
Coot Observed Totals, Thrupp Lake
Coot Observed Totals, Thrupp Lake
Coot Simulated Presence, Thrupp Lake
Coot 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. Coot. Field Notes Journal. ID FN-WL-SEASONAL. Version 2026.05.26. https://fieldnotesjournal.uk/wildlife/seasonal/thrupp_lake/coot.html

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

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