Video compiled by Parabols, LK forum
Estonian text posted 10.12.2017
Otter’s fish hunt
Otter Saarmas Lutra lutra
This year the otter visited the spawning ground at intervals of a few days.
What harm can the otter do at a spawning ground? If it catches a fish with roe it is of course not good. There were more fish with milt moving around. In the food remains of otters at trout rivers such about 200-
Instead it is more important that the presence of the otter keeps mallards away from the spawning ground during night but more about that below.
The plunder of the spawning ground by mallards last year was recorded by Fleur, LK forum:
Mallard Sinikael-part Anas platyrhynchos
The “innocent-looking” mallards that operate at the spawning grounds of salmonid fish do quite considerable harm there when the water level is low. The whole action in the video looks studied, tested and deliberate.
Mallards can often be seen in autumn at spawning areas where they are seldom encountered in spring and summer
This year the water level in the spawning river was some twenty centimetres higher and the mallards simply could not reach down to get hold of the roe. Screencap from this year by Liz, LK forum
Screencap below by IceAge, LK forum
Grey heron Hallhaigur Ardea cinerea
The grey heron is a large bird; this summer we transmitted webcam images from their colony; so there is no need to describe the bird here.
We saw the heron walking across the spawning ground only a few times. Although fish belong on their food list they mainly hunt for small specimens, about