Field Notes Journal

Seasonal Analysis and Species Classification

Bluebell

Model Family : Seasonal presence

A single bluebell (Hyacinthoides non-scripta) against a soft field of blue and green
A single bluebell (Hyacinthoides non-scripta) against a soft field of blue and green David Walker, Pixelfed ( CC BY 4.0 ) Source - No changes made
Bluebells beneath mixed woodland, Radley Large Wood
Bluebells beneath mixed woodland, Radley Large Wood David Walker, Pixelfed ( CC BY 4.0 ) Source - No changes made
A large trunk rising through bluebells in bright spring light
A large trunk rising through bluebells in bright spring light David Walker, Pixelfed ( CC BY 4.0 ) Source - No changes made
Bluebells under broken sunlight beneath fresh leaf
Bluebells under broken sunlight beneath fresh leaf David Walker, Pixelfed ( CC BY 4.0 ) Source - No changes made
A leaning trunk cutting across a dense bluebell carpet
A leaning trunk cutting across a dense bluebell carpet David Walker, Pixelfed ( CC BY 4.0 ) Source - No changes made
Woodland structure above the bluebell layer, Radley Large Wood
Woodland structure above the bluebell layer, Radley Large Wood David Walker, Pixelfed ( CC BY 4.0 ) Source - No changes made

Summary

Bluebell

Narrow spring seasonal presence

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

Confidence
High
Fit score
0.047
Peak
May
Season
April–June

Seasonal wheel

Seasonal wheel for Bluebell Bluebell 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
4.185
Season end month
5.595
Forcing peak month
4.88
Season width months
1.41
Season midpoint month
4.89
Season start label
April
Season end label
June
Forcing peak label
May

Observed and Simulated Seasonal Patterns

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

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

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