Patelka 1947 Psaltriparus minimus May 11 Woolsey Canyon. Nest found in oak, 10 feet above ground, in dense foliage on west side. Young left nest and nearly. One fledgling found on ground below nest, giving single weak note intermittently. It was weak, unable to fly. (not fully grown) Basil thirdry spring feathers were still sheathed. And defecated in my hand, so that it apparently had been fed within preceding 24 hours. It gaped for food several times. Adults and young present downslope 75-100 feet away. This incident indicates likely losses in large brush-tit flocks resulting from variable degree development among young at time they leave nest and from adult indifference to "runts" once greater part of brood leaves nest.