e neighbourhood. In a
short time the birds collapsed, and at 9.15 A.M. were dead. On the 29th
May, at 6 A.M., a second nest was removed, containing young of
approximately the same age, and although the conditions were more
normal, the temperature being 50 deg. F., the birds collapsed at 8 A.M.,
and an hour later one of the brood showed little signs of life. The wind,
however, then changed to the west, and the temperature rose one degree,
with the result that they were still living at 11 A.M. A further
experiment was made with Song-Thrushes on the 5th June. The wind was in
the south and the temperature 63 deg. F. The young, approximately four days
old, were removed at 7.25 A.M., but as they showed no signs of collapse
at 1 P.M. I replaced the nest in the original site.

On the 30th May, a nest of Whitethroats three days old was removed at
7.15 A.M. The wind was northerly and the weather fine, but the
temperature low--50 deg. F. At 8.15 A.M. the birds showed no sign of life.
A second experiment with this species was made on the 10th June under more
favourable circumstances, for although the sky was overcast and the wind
northerly, the temperature was 59 deg. F. In this case the young survived
from 6.55 A.M. to 7 P.M.

On the 27th May 1915, a nest of Hedge-Sparrows hatched the previous day
was removed at 7 A.M. The temperature was below the normal, being 49 deg.
F. At 8 A.M. the young were cold and in a state of collapse, but they
survived nevertheless until 3.20 P.M.

On the 7th June 1915, a nest of young Skylarks three days old was
removed at 7.15 A.M. The temperature was 62 deg. F., and the birds survived
until 4 A.M. the next day.

On the 6th June 1916, a nest of Linnets just hatched was removed at 6.47
A.M. The temperature was 51 deg. F. At 7.50 A.M. the birds were cold and in
a state of collapse, and only survived until 8.50 A.M.

CHAPTER VI

THE WARFARE BETWEEN DIFFERENT SPECIES AND ITS RELATION TO THE TERRITORY

We have now considered the various ways in which the territory is useful
in furthering the life of the individual. We have seen that, in some
cases, there is competition for stations where the egg or eggs can be
deposited and incubated in safety; that, in others, there is competition
for stations capable of furnishing an adequate supply of food for the
young; and that the establishment of "territories" not only renders the
attainment of reproduction for the individual secure, but ser