ioi6. Patten — Trec-Pipit on Tuskar Rock. 87 
during active migrations the rock becomes studded with 
dead and wounded birds ; many of the latter also creep out 
of sight to die in shelter and quietude. I soon learned to 
locate these avian sepulchres/ and having pointed them 
out to the lightkeepers I asked them to examine their 
contents regularly, impressing them with the fact that 
fragmentary remains of birds ought not to be overlooked 
or cast aside, but should be exhumed, preserved, and for- 
warded to me for investigation, for from such specimens 
much Hght could be shed on the migratory movements 
of the birds, and the manner in which their fate was sealed 
at the light-station. I owe a debt of gratitude to the 
lightkeepers for their ready response in this direction, and 
in particular, to Mr. Glanville, who has interested himself 
immensely in seeking out every morsel of avian material 
in the most zealous manner. I have conserved quite a 
quantity of fragmentary remains of migrants from Tuskar 
light-station ; these are of considerable value in helping me 
to elucidate important points in my migration work, as I 
hope to show in future writings on the subject. 
Description of the Specimen. 
The fragmentary remains of a Tree-Pipit, the particulars 
of which form the textual part of this paper, were dis- 
covered by Mr. Glanville on October i6th, 1915, on Tuskar 
Rock. They were handled and packed in a most careful 
manner and forwarded to me for analysis. They were 
fairly dry when I received them, but in his letter the donor 
states that " the bird was nearly all eaten by worms, and 
was lying in wet sludge." This made the specimen all the 
more fragile and difficult to remove from the ground. He 
managed, however, to save the feet, the skull, and 
the wings ; the latter v/ere still clothed with feathers, 
the primaries, secondaries, tertials (inner secondaries), 
and coverts being nearly complete on the left wing, 
though some of the secondaries, tertials, and coverts 
had become detached from the right wing. The feet were 
(^) Birds in hiding seemed to exercise a certain amount of choice of 
site ; during active migrations some repesses about the rock very seldom 
contained dead or dying birds, others were seldom empty. 
