Secrets of Nature № 7 (1984)

In newsreel includes the following topics:

Part 1.

1st plot.

Frog-adventurer.

Mountain landscape in Bulgaria.

Mountain View Bill Planina, rivers, swamps.

Herbal frog in water.

Zoologists catch frogs ringed them, let loose.

Zoologists rise to the top of the mountain, catch frogs in mountain streams and ringed them - put on two rings.

Zoologists study how herbal frog spring from the mountains down into the swamp, and in the fall for winter climb into the mountains on land already.

2nd story.

Rattlesnake.

Desert landscape.

Rattlesnake crawling.

Part 2.

Rattlesnake hunts on the mouse: stalking her, biting and then swallows.

Third plot.

European mink.

View the stream.

Mink in the grass, digs a hole.

Frog in the grass.

Mink is building a nest in a hole in the grass.

Young in the nest burrows.

Mink looking for prey: hunting for fish in the river, frogs, mice and other small rodents.