break covert

But they had to deal with a wary bird, who would not break covert till it suited his own convenience.

And then, though a fox will not long run up wind, he will break covert up wind, as often as not.

First to break covert was Frederick, Mr. Fletcher's assistant.

These old and cunning stags do not always break covert so readily, as the following incident will show.

We stood waiting silently for an eternity, as one waits for a hare to break covert before the beaters.