2 Words to use with wren

Once more the house-wren aloud, "per-se-cu-testper-se-cu-testper-se-cu-testper-se-cu-test!"

Now the weary travellers are resting on the bank of a brawling brook, along which they are delighted to see the lively Dipper frisking wren-like from stone to stone.

2 Words to use with  wren