Invertebrate
Mayflies
- Records in GBIF
- 2 871
- Fishing districts near where it occurs
- 1 399
- Most sightings
- June

About the species Mayflies
About the species
An insect with aquatic larvae. Adults live only briefly and hatch all at once in swarms.
Where to find it by the water
The larvae live in clean flowing and still waters, under stones, in sand and among plants. Adults fly over the surface.
What this means for anglers
A mayfly hatch is a signal for the fly angler: trout, grayling and chub then actively pick from the surface. The larvae live only in fairly clean water.
When it is observed
Records by month in the areas around the fishing districts (GBIF).
- 0Jan
- 27Feb
- 29Mar
- 581Apr
- 685May
- 786June
- 377July
- 140Aug
- 96Sep
- 150Oct
- 0Nov
- 0Dec
In November the species is observed less than in the main season. Most records are from June.
The records come from people's observations and also reflect when and where observers move around. They are not a measurement of numbers or a guarantee of an encounter.
Where it was recorded
Fishing districts around which a record of this species exists. Sorted by number of records.
- Belá č. 1a 265
- Belá č. 1b 265
- Biely Váh č.1 265
- Čierny Váh č. 1 265
- Čierny Váh č. 2 265
- Demänovka č. 1 265
- Galovanská zátoka 265
- Sokolčianska zátoka 265
- Jalovecký potok 265
- Jelešna 265
- Kvačianka 265
- Orava č. 4 265
- Petruška 265
- Orava č. 3 265
- Paludžanka 265
- Smrečianka 265
- Štiavnica č.1 (Lipt. Mikuláš) 265
- Trnovec 265
- Váh č.20 265
- Váh č.21 265
- VN Liptovská Mara 265
- Váh č.22a 265
- VN Orava 265
- VVN Tvrdošín 265
- Biely Váh č.2a 265
- Studený potok č. 1b (Trstená) 265
- Oravica č. 1a 265
- Oravica č. 1b 265
- Váh č. 22b 265
- Štrkovisko Okoličné 265
- Biela Orava č. 1a 189
- Biela Orava č. 2 189
- Biela Orava č. 3 189
- Bystrička (Dol. kubín) 189
- Čutkovo 189
- Istebnianka 189
1,399 fishing districts in total, 36 shown. The number next to a fishing district is the number of records around it. Show on map
More species from the group insects, crayfish and mussels
Photo credits
- Mayflies: Photo: Richard Bartz, Munich aka Makro Freak Image:MFB.jpg, CC BY-SA 2.5, Wikimedia Commons
- Dragonflies: Photo: Paul Balfe, CC BY 2.0, Wikimedia Commons
- Caddisflies: Photo: Bruce Marlin, CC BY-SA 2.5, Wikimedia Commons
- Horseflies: Photo: Bruce Marlin, CC BY-SA 2.5, Wikimedia Commons
- Mosquitoes: Photo: Katja Schulz from Washington, D. C., USA, CC BY 2.0, Wikimedia Commons
- Castor bean tick: Photo: W.alter, CC BY-SA 4.0, Wikimedia Commons
- Noble crayfish: Photo: Dragon187, CC BY-SA 3.0, Wikimedia Commons
The advice is general and does not replace the instructions of a doctor, rescuers, the site manager or the fishing regulations. Do not disturb protected species or dismantle their shelters.





