...Use a spring pole and if one does not grow handy, cut one and set it up as firmly as possible about four or five feet from the burrow and to one side... 
A. R. (Arthur Robert) Harding 「Deadfalls and Snares」
...Down the burrow she went first, but it was toolate; her babies were dead...
Ernest Thompson Seton 「Wild Animals at Home」
...The child hissed and snarled at him like awild thing, and retreated as far as he could tillchecked by a turn in the burrow...
Ernest Thompson Seton 「Wild Animals at Home」
...Single egglaid at end of burrow in the ground...
Chester A. Reed 「The Bird Book」
...Two eggslaid on gravel at the end of a burrow,about two feet from the entranceand 285 feet above the sealevel...
Chester A. Reed 「The Bird Book」
...Singleegg at the end of a long burrow...
Chester A. Reed 「The Bird Book」
...Single egg laid at theend of a burrow...
Chester A. Reed 「The Bird Book」
...White egg laid on bare groundat the end of three foot burrow...
Chester A. Reed 「The Bird Book」
..." Sir Walter Elliot goes on to give a mostinteresting account of the construction of the burrows of thisanimal...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...If you find where there is a burrow with a family of young foxes, watch them all you can during your leisure moments...
A. R. (Arthur Robert) Harding 「Fox Trapping」
...When using bait, if not setting in a bed, find a spot where little building is required to protect it--a hollow log or stump, the entrance to an old burrow, a niche in a ledge or hole under a rock...
A. R. (Arthur Robert) Harding 「Fox Trapping」
...Down in the valleys they sometimes den in the ground, enlarging the burrow of a badger or other animal...
A. R. (Arthur Robert) Harding 「Wolf and Coyote Trapping」
...By placing my ear to the mouth of the burrow, I could hear the pups whining...
A. R. (Arthur Robert) Harding 「Wolf and Coyote Trapping」
...In addition to the main den the animal has a number of others nearby, so that one would scarcely know which of them is the main burrow...
Elmer Harry Kreps 「Science of Trapping」
...The wolverine makes its home in a burrow...
Elmer Harry Kreps 「Science of Trapping」
...At irregular distances along the burrow, the animal makes a short branch passage leading up to the surface, where it deposits the dirt dug from the main passage, in the form of a mound...
Elmer Harry Kreps 「Science of Trapping」
...They like those which have been cut off in trimming the hedges, because in them the pith is exposed and they can burrow their way into it without gnawing through the wood...
Edward Saunders 「Wild Bees, Wasps and Ants」
...The beings who find a home in such localities are ofclosely allied species, chiefly a variety of worms, who burrow their wayinto the mud, and seem to court the miasma sofatal to other creatures...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
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