Page1. Field notes - Bats. Dec.10. 1927. On low hills east of Portello are many deserted mining tunnels varying in running horizontally into the hills and varying in depth from 50 ft. to 500 ft. 3 Long Eared Bats were found about 50 ft from entrance, hanging openly on the rock ceiling of the tunnel; 2 or 3 more on ground outside. much evidence of pack rats in tunnels. Dec.11. Returned to mine to check black rat sets; No rats; closer examination disclosed four small brown bats crowded into covies. I was unable to wake one of them from the covee and left it fifteen minutes to get some small wire. On returning the bat had moved. I soon located it on the roof but had some trouble in taking it with a flash dlight. This indicates that they are quite active and not in a semi-hibernating stupor. There is no evidence any where of available insect food.