Swifts arrive
Apus apus
Window
Typical: 25 Apr – 15 May (2026)
High-altitude insects. Also a barometric indicator.
Relevance to fishing
High-altitude insect indicator — when swifts are screaming high it's settled warm weather; low and squeaking under cloud means front coming through.
Phenology chain
Triggers
- Mayfly main hatch typically 21d after (range 14 – 30d)
+ I saw this today
Observation history (0)
No observations yet. Log one above when you spot this event.