New-York tribune., 1900-11-25

nest itself the condition Of the young
AT birth, haunt, locality, structure OF the bird and
demands for protection. With birds which
born covered with feathers and which swim
run about after leaving the egg the
only incubator. and is therefore
rudely built or wholly wanting. But with birds
which born naked the nest is cradle well
incubator, and Is therefore more complex
in structure. a fact largely accounting for the
architecturaIly higher types Of nests built by oul
lasserine birds.
our sea swallow and sea gull are OF the precocial
s9rt the & nest cons'itHting mereig few "sPs OF
Samf Ran lea the ness amGT5 1 im
no nest. because It's young are Matched with
fluffy down on their bodies
whose young are born naked The cuckoo though
1t constructs a nest OF rudimentary character.
builds one which will protect its young. which
s@mabIy in the order in which the eggs were laid.
all IN building. but burrows hole as substitute
The chimney swift builds It's nest with twigs
creton in it's salivary glands. which deposits as
required. Rain easily moistens this glue, and quite
locality affects the character of the nest through
though, as, rule, birds build to type, they
often avail themselves Of opportunity to Sc
haps the most accessible material spanish moss
srows Orioles. hawks and kites make use Of il,
The robin always builds true TO type, using mud
Skin for some Neutrality-suspicious. reason and The
crow always employs pieces OF bark. The robins
of the Mexican tableIand build a similar to
robins but the Acadian 1ycatcher Of Florida
employs Spanish moss. and its nest. consequently.
is wholly unlike those of more Northern birds of
the same species. Orioles show ready appreCia-
tion OF the value of worsted and string over plant
iibreS.
The structure of the bird in some degree
nected in the structure of the nest. The wood
peckers Chse-like bill serves a tool with which
It's owner eXcavates dwelling. while the inability
Cf the loon walk ueceSSitateS a into which
it push itself from the water. The elder duck
finds building material in the down plucked from
its own breast. This IL also uses for the purpose
of concealing its eggs The structure OF the bird.
however, is a matter of little Importance in this
connection birds of essentially the build
make very unlike nests eVinced in those of the
chimney swift. barn and bank swallows.
Protection secured by the structure of the il
illustrated by that of the yellow headed titmouse
whose nest Is covered with thorns. which the bird
in which u grows. The yellow warbler Is often
imposed upon by the CoWbird. The latter is ac-
cuStomed To deposit lis eggs In the WarberS
for the latter to hatch. When this is done the
story the egg and removing to this new nest
II the cowblrd persists in laying egg in this
nest also, third story is built by the energetic
warbler. who Is determined not 10 incubate the
welcome egg.
The adapta ton to new conditions by the birds in
the selection of site and nature of the nest Is H.
| ed where swallows and
hlueblrds avail themselves of the protection az
forded by houses erected for their disposal.
| The question to whether birds inherit their
ability to build nests resembling the in which
they were Matched discussed. Wallace 4
theory that bird learns to make it's peculiar kind
of nest by remembering the appearance of the nest
| ected, and an instance cited of pair of English
chafinches which reared apart from individuals
of their species. and afterward released in in
closure, proceeded to build a characteristic chat
| finch nest.
The lecture in the course will be devoted to
a study of birds eggs and young birds.