Plant
Black alder
- Records in GBIF
- 3 919
- Fishing districts near where it occurs
- 1 400
- Most sightings
- June
About the species Black alder
About the species
A riparian tree whose roots reach below the water surface.
Where to find it by the water
Banks of streams and rivers and damp floodplain forests and wetlands.
What this means for anglers
Alder roots hold the bank and create undercut hides in which trout and other fish stand. Leaves falling into the water are food for aquatic insects.
When it is observed
Records by month in the areas around the fishing districts (GBIF).
- 23Jan
- 21Feb
- 42Mar
- 145Apr
- 448May
- 902June
- 825July
- 740Aug
- 440Sep
- 234Oct
- 37Nov
- 19Dec
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.
- Lakšár 467
- Rudava č. 1 467
- Chvojnica č. 1 467
- Potok Trnávka 467
- Chvojnica č. 2 467
- Farská voda 467
- Hlbocké rameno 467
- VN Koválov 467
- Kanál Kátovské jazero 467
- Kátovský Kút 467
- Melioračný kanál Tvrdonice 467
- Morava č. 7b 467
- OR Podkova 467
- Morava č. 8 467
- Myjava č. 1 467
- Myjava č. 2a 467
- VN Kunov 467
- OR Lipa 467
- OR Žlutnica 467
- VN Buková 467
- VN Mlynky 467
- VN Radošovce II. 467
- Vrbovčianka 467
- Baráky 467
- Štrkovisko Lakšárska Nová Ves 467
- OR Krátke 467
- OR Hámre 467
- OR Patkový Piesok 467
- Rašelinisko Plavecký Peter III. 467
- Rašelinisko Plavecký Peter IV. 467
- Rašelinisko Plavecký Peter Rybník I. 467
- Štrkovisko Adamov č. 1 467
- Štrkovisko Adamov č. 2 467
- Štrkovisko Boričky I. 467
- Štrkovisko Boričky II. 467
- Štrkovisko Brodské 467
1,400 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 plants
Photo credits
- Black alder: Photo: AnRo0002, CC0, Wikimedia Commons
- Common reed: Photo: W.carter, CC0, Wikimedia Commons
- Broadleaf cattail: Photo: Peter O'Connor aka anemoneprojectors from Stevenage, United Kingdom, CC BY-SA 2.0, Wikimedia Commons
- Yellow flag iris: Photo: Myrabella, CC BY-SA 3.0, Wikimedia Commons
- Common duckweed: Photo: author not stated, CC BY-SA 3.0, Wikimedia Commons
- Japanese knotweed: Photo: W.carter, CC0, Wikimedia Commons
- Himalayan balsam: Photo: H. Zell, 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.