1.
Red Deer Stag Roaring and Wild Boars
2.
Night Birds and Distance Traffic
3.
Mallard Ducks Calls in Flight
4.
Evening Birds on Danube River, Srebarna Reserve
5.
Birds Calling Danube River, Srebarna Reserve
6.
Evening Birds in Srebarna Reserve
7.
Evening Birds in Srebarna Reserve, Bulagria
8.
Night Birds Call in Srebarna Reserve, Bulagria
9.
Mute Swan and Ducks Calls in Srebarna Reserve, Bulagria
10.
Greylag Goose Distance Call
11.
Great Spotted Woodpecker Call
12.
Wolves and Birds Call in Srebarna Reserve, Bulagria
13.
Grey Heron and Tawny Owl Call in Night
14.
Tawny Owl and Grey Heron Call in Srebarna Reserve
15.
Tawny Owl and Grey Heron Call
16.
Morning Birds Call in Srebarna Reserve, Bulagria
17.
Morning Birds Call
18.
Birds Taking Flight and Calls in Srebarna Reserve