Hawks cause of listurbance? There is, of course, a possibility that a hawk or hawks may be responsible for the disturbances in the road-runner cage. This morning, at 7:30, a Cooper or a Sharp-shinned hawk was sitting on a snag of the old oak 20 or 30 yards from the cage, which was in plain sight of him. The road-runners, however, either did not see him, or else were indifferent to his presence. B sings early. B was heard singing a little about sunrise. RR tails. (Correction to preceding notes). See top of p.1083. This morning, on carefully examining the birds and the feathers found day before yesterday morning, it was seen that one of the tail feathers was an old one of Archie's; the other a new one of Terry's, still pulpy inside and still with the deciduous sheath on the quill. The other was from Archie's right hand side. He has now only five white spots under- nearth his tail. These feathers are rights and lefts and easily identifiable as to location. Also the birds allow me to fit them back in to their original locations approximately. 2 It was also found that Terry still has one of the old broken- off rectrices. By parting his feathers it is seen that he has only three white tipped rectrices. These birds have ten rectrices. The two middle ones are the longest. The three outer ones on each side are the only ones that have white tips. These tips show only from below normally, but when the tail is displayed, then show from above. Translucent lower lids. While Terry was sitting on my hand this morning removing "dan- druff" from his feathers, I helped him by blowing it away. When he reached back for oil he partially closed his eyes, as these birds always do when making a long reach thus. It was easy to see that the lower lid is semi-transparent, notwithstanding its slaty tue, because the brassy ring about the pupil plainly shows through. As the bird, when sleeping, closes its eyes mostly with the lower lid, it is evident that, unless the eye balls are rolled down- ward (or upward) too far, the bird is able to distinguish fairly moderate differences in the intensity of illumination of surround- ing objects, and therefore, probably also moving objects. This seems to be intended as a measure of protection. I have watched them as they doze off and although I am not sure that it is invariably the case, they eye-balls are rolled downward below the waking position. If the human eye is rolled upward under similar conditions, it seems logical, considering the difference in the action of the lids in the two animals, that the road-runners' should roll in the reverse direction. Archie's bill. The decurved tip which has replaced the one that was broken off has not yet quite extended down to the level of the under side of the lower mandible. Terry's bill. The tip, as in Rhody, though not so pronouncedly, extends below the lower mandible. Terry never lost this tip, although, as herein noted it was damaged. Consequently the surmise that these tips are normally deciduous was not correct. The thought was that the juvenile tip might be replaced by an adult one of tougher text- ure, as a regular thing. Morning-bird. 7:35 P.M. The hummer is on his regular roost and has been there since darkness fell. (Clear, calm). This looks like a habit. November 5th. At about 8 A.M. I went to the cage. The young road-runners