The Bottineau courant. (Bottineau, Bottineau County, N.D.) 1895-1929, 1921-12-29

thrashers seek their insect prey on or near the
ground woodpeckers, nuthatches, titmice, and
chickadees closely search the trunks and limbs OF
trees; vireos and warblers scan the leaves and
probe the flowers; and fycatchers and swallows
sweep their prey from the air itself. Every few
minutes all day long the hungry young must be
fed and that they are well fed their rapid growth
attests. The quantity of insects they and their
parents consume Is enormous. Not only orchards
benefit by the good work Of birds, but gardens,
berry patches, and plowed and newly soWn heids
as well. While fields actually grown to tall crops
are less freely visited, all crops are helped to some
extent, and practically every farm pest has Its
bird enemies.
To learn exactly how and to what extent birds
are aids to agriculture, horticulture, and forestry,
the biological survey has been making a scientific
study of their food habits ever since it's establish
ment in 1885. \ It's Investigations are carried on In
both the field and laboratory. All. that can be
learned out of doors by direct observation and by
study of the available food supply Is valuable, but
there is a surer WY of finding out what a bird
eats, namely, to Look into it's stomach, 1t has
been repeatedly demonstrated that the nature OF
the food and feeding habits of birds Is such that
It Is impossible to arrive at definite results by d.
rect observation. On the other hand, the examlna-
ton in the laboratory of the contents of the stom-
ach gives %nformatio that is definite, exact, and
indisputable.
From the percentages and the economic value
Of the food items, the utility of a bird can be
closely estimated. The biological survey is then :
able to recommend how it should be treated.
II In the United States are found more than 800
distinct kinds of birds of 60 families, of which 20
families are classed as waterfowl, Z as shOrebirds,
A as upland game birds, 5 as birds of prey, and .33
as land birds. .
The upland game birds comprise such familiar
groups as the quail, grouse, ptarmigan, wild tur-
keys, wild pigeons, and doves. The last two, while
nSua11v harmless sometimes 1amapp crOnS TO an
extent which requires that they be controlled, and
economically they deserve less consideration than
the turkey, quail, and grouse. These three kinds
of birds have feeding habits which are helpful to
agriculture. They may be hunted, but their num-
bers should not be reduced below the normal pop
ulation for each type Of country.
Hawks and owls, though not closely related.
may be considered together on account Of the sim
ilarity Of their feeding habits. Feeding chiefly up
on>living animals smaller than themselves, natur-
! ally they sometimes prey upon some of the domes-
ticated kinds, particularly poultry. This has given
them a bad reputation with farmers, so long estab-
I lislled as to amount to traditional prejudice. Sci
entifc investigation of their habits shows that only
a few species of hawks and only one owl feed chief
~, or even largely, upon birds, and therefore to
any great extent upon poultry. The birds Of prey
regarded as chiefly injurious include the sharp
Skinned, Cooper, and duck hawks, the %goshawk, and
the great horned owl. The great horned owl, which,
like most of it's relatives, feeds at night, gets only
poultry that is improperly exposed, and when pre-
vented from doing this, it's habits are largely bene-
fetal.
The remaining species of hawks and owls, more
than 500 in all, have useful habits. They feed on
a great variety of rodents and have, a tremendous
effect in controlling the numbers Of these pests.
Their staple food consists for the most part Of
meadow mice, but 1t includes also many other de-
structive rodents, such as rabbits, ground sQuir-
rels, prairie dogs, pocket gophers, and house rats
and mice.
The barn owl Is one of the most Useful of the
birds of this group. Its food is easily studied by
examination of the pellets, made of the hair and
bones of its victims, which accumulate about its
roost. In 675 barn-owl pellets collected in Wash