Field Notes Journal

Seasonal Analysis and Species Classification

Yellow Flag Iris

Model Family : Seasonal presence

Summary

Yellow Flag Iris

Narrow spring seasonal presence

Yellow Flag Iris is classified as narrow spring seasonal presence. The fitted seasonal window runs from about May to June, with a spring peak around May. The season is narrow, with a moderate active window, strong post-peak decline, and moderate off-season suppression.

Confidence
High
Fit score
0.018
Peak
May
Season
May–June

Seasonal wheel

Seasonal wheel for Yellow Flag Iris Yellow Flag Iris Peak: May

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
5.115
Season end month
5.885
Forcing peak month
5.45
Season width months
0.77
Season midpoint month
5.5
Season start label
May
Season end label
June
Forcing peak label
May

Observed and Simulated Seasonal Patterns

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

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

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