Field Notes Journal

Seasonal Analysis and Species Classification

Horsetail

Model Family : Seasonal presence

Summary

Horsetail

Extended summer seasonal presence

Horsetail is classified as extended summer seasonal presence. The fitted seasonal window runs from about April to September, with a summer peak around July. The season is broad, with a moderate active window, moderate post-peak decline, and moderate off-season suppression.

Confidence
High
Fit score
0.026
Peak
July
Season
April–September

Seasonal wheel

Seasonal wheel for Horsetail Horsetail Peak: July

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
4.235
Season end month
8.78
Forcing peak month
6.58
Season width months
4.545
Season midpoint month
6.508
Season start label
April
Season end label
September
Forcing peak label
July

Observed and Simulated Seasonal Patterns

Horsetail Observed Presence, Abingdon
Horsetail Observed Presence, Abingdon
Horsetail Observed Totals, Abingdon
Horsetail Observed Totals, Abingdon
Horsetail Simulated Presence, Abingdon
Horsetail 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. Horsetail. Field Notes Journal. ID FN-WL-SEASONAL. Version 2026.05.26. https://fieldnotesjournal.uk/wildlife/seasonal/abingdon/horsetail.html

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

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