"The problem is there's quite a big road round the lake and for a 300m section, the toads are tumbling out of the woods to try to get to the lake, " he said.

BBC: Toad tunnel: Llandrindod Wells road shuts for mating

CNN's Miguel Marquez reported from near Big Bear Lake and Lateef Mungin wrote from Atlanta.

CNN: STORY HIGHLIGHTS

Since then, much of the manhunt for Dorner has focused in and around the San Bernardino County mountaintop resort of Big Bear Lake after Dorner's pickup was found burning in the area.

CNN: LAPD to review firing of ex-cop it's hunting