Field Notes Journal

Seasonal Analysis and Species Classification

Swift

Model Family : Seasonal presence

Summary

Swift

Extended summer seasonal presence

Swift is classified as extended summer seasonal presence. The fitted seasonal window runs from about May to October, with a summer peak around June. The season is broad, with a sharp active window, strong post-peak decline, and strong off-season suppression.

Confidence
Medium
Peak
June
Season
May–October

Seasonal wheel

Seasonal wheel for Swift Swift Peak: June

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
4.975
Season end month
9.575
Forcing peak month
6.065
Season width months
4.6
Season midpoint month
7.275
Season start label
May
Season end label
October
Forcing peak label
June

Observed and Simulated Seasonal Patterns

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

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

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