*>1 •v. t) 5 0 < tf v\ _V,0M DEP\i,r JUN 2 0 1919 1) ANIMAL NUMBER A tib A tS; fi ^f«. ^T^ >»+». ^H». ^+». ^W /^^ .«+». <«+*> .»+-> ^W *+^ ■-+». -+» ft -ST 16T0RE-5TODY QEl/lEH I Devoted Primarily to all Scientific Studies of Nature in Elementary Schools Vol. 14 No. 1 JANUARY, 1918 One year (nine issues) $1.00 Whole No. 114 15c per copy OFFICIAL ORGAN OF THE MflEMCAN NATURE ST odt socn: w Mr Mr Something Up There! Lion cubs in the Los Angeles Zoo ?> sr St *r m fi§i& *f> *& <$> *t* <§> *& • «> • <& <& •* & * "ST Books are Worth-while Gifts THE PET BOOK ANNA BOTSFORD COMSTOCK A book Ml of unique nature-lore about the little brothers and sisters of the field and hedge and tree and burrow, their tricks and traits. Frontispiece in color by Fuertes. 310 pagto plus 117 full-page plates. Library buckram binding, $2.00; postpaid $2.15. NATURE SONGS AND STORIES CATHERINE CREIGHTON Beautiful pictures, clever little stories and eighteen "singable" songs are here used to present Nature- Study to little folks. Special illustrations by Fuertes, Anna C. Stryke and Verne Morton. 76 pages 75c; postpaid 80c. HOW TO KNOW THE BUTTERFLIES JOHN HENRY COMSTOCK and ANNA BOTSFORD COMSTOCK A Manual of the butterflies of the eastern part of the United States. 45 colored plates, 50 other illus- trations. 320 pages. $2.50. Postpaid $2.70 TREES AT LEISURE ANNA BOTSFORD COMSTOCK A tree lover's tribute to her favorites of the field and woodland during their season of winter rest. A book that will be treasured by all out door lovers. Beautifully illustrated. Postpaid 50c THE COMSTOCK PUBLISHING CO. Ithaca, New York Kindly mention The Nature-Study Review when replying to advertisements THE NATURE-STUDY REVIEW Volume XIV, 1918 ANNA BOTSFORD COMSTOCK SECRETARY-EDITOR Cornell University Published by THE COMSTOCK PUBLISHING CO. Ithaca, N. Y. *4- £ «3 THE NATURE-STUDY REVIEW Vol. 14 January, 1918 No. 1 The Thirteen-Striped Spermophile, or Striped Gopher E. Lawrence Palmer. Ph.D. Professor in Biological Sciences, Iowa State Teachers' College Any one who has lived in the prairie region of the middle west cannot help but be familiar with these animated ten pins. One does not need to spend hours in search of material for nature-study here for as he goes walking or riding through the prairie country these "now-you-see-me, now-you-don't" animals make up a con- spicuous part of the landscape. With ears pressed close to the rounded head, with body erect and fore paws so small as to be inconspicuous, these animals stand perfectly stiff and rigid at the approach of any thing unfamiliar. There seems to be a dead line somewhere, however, because all of a sudden there is a sharp whistle and the approaching enemy sees only a scurrying brown form or nothing at all. The writer had an excellent opportunity to observe these animals on the campus of the Iowa State Teachers' College at Cedar Falls, Iowa. Here, they manage to hold their own in spite of small boys who snare them, learned professors who poison them and a large coterie of cats which are protected by the ever present janitor who can see nothing of good in "just gophers." In spite of all of these handicaps, the campus has each year managed to boast a family or two of these interesting animals. Last summer, a family took up its headquarters under the sidewalk just outside my office. About two thousand people must have passed this animal home at least once or twice even- school day of the summer term and yet but few stopped to acquaint themselves with any of the interesting habits of its occupants. Most of the people passed by without a thought, never noticing the round head with close cropped ears and bright eyes peeking at them from the edge of the concrete a few feet away. The animals became so tame that one could approach within ten feet without great difficulty and I have 1 2 NATURE-STUDY REVIEW [14:1— Jan., 1918 seen groups of people pass by twenty feet away without alarming the animals sufficiently to scare them into their burrows. These spermophiles remind an easterner very much of the chip- munk he used to chase through brush piles in the wood-lot. They are larger animals, however, and prefer a land covered with a good hard sod to the leaves and clutter of the forest floor. They are at least an inch and a half longer than their chipmunk relative and their habit of standing erect makes them appear much longer than the eleven inches which is their maximum length. Their backs are so characteristic that scientists have given the species the name of tridecemlineatus to signify the thirteen stripes which they bear. These stripes are not exactly continuous but consist of dirty yellow bands alternating with broader dark brown or chestnut bands, the darker bands being dotted by a row of light spots which tend to run together towards the head. The under parts are uniformly dull yellow brown, becoming white at the chin. The tail, which one remembers because of the animal's habit of giving it a defiant flip on disappearing into the burrow, is yellowish in the center and sur- rounded by a band of yellow tipped black hairs. Along early in April, the first spermophiles appear on the campus but usually they are so few in number that they do not attract attention. We are told that the male deserts his family on the arrival of the young and it is certain that during May and early June there was little evidence that the burrow under the walk was inhabited. I had almost come to the conclusion that the campus cat had discovered the family but about the last week in June I discovered the mother and her young. I doubt if the mother had been confined to the burrow as much as my observations would indicate, but I know that I was unaware of the presence of the animals for some time. Cloudy weather is not favored by the gophers and, as we had this quite commonly, they were not out as much as one would have wished. We are told by E. T. Seton that there are usually nine in a litter. I know that I have seen six young at one time and am not averse to believing that there may have been more. Life evidently begins in earnest for the young gophers as soon as they are able to see the world. Almost any time of day when the sun is shining we could see them out busily gathering up elm fruits and other foods. I remember one evening particularly when the little family was entertaining a bunch of students. The gophers are usually seen palmer] THE THIRTEEN-STRIPED SPERMOPHILE 3 only during the daytime but it had rained all that morning and it was not until late afternoon that the grass was dry . The work day apparently was being stretched to the limit because it was quite dusk before they ceased their activities. Unfortunately, these activities were being interfered with by students who were amusing themselves watching the heads pop in and out of the entrances to the burrows. Almost invariably, the old one would appear first to see if the coast was clear . If not scared, she would be followed by the others who came out of the hole each stopping just as he was about half way out to be convinced personally that the coast was clear On being satisfied as to his own safety, each would scurry off a few steps through the grass, stop and then go on a short dis- tance. When all had gotten out and away from the hole someone would scare them and then the two-inch entrance to the burrow would certainly be busy for awhile. Hunger or excessive energy, however, could not keep all of this life underground long and within less than a minute by the watch, sometimes, the whole show would start again. The food of these spermophiles has been the subject of quite a bit of investigation and, as is often the case, the first verdict which man pronounced against this wild thing was rather unjust. Boun- ties have been placed on them in different states because they were known to eat grain. They did and still do eat grain but Vernon Bailey in Bulletin 4 U. S. Dept. of Agr., 1893 and E. A. Beal in Bull. No. 6, Iowa Exp. Station, 1889 both come to the same con- clusion that the grain destroyed is well paid for by the cutworms, grasshoppers and even mice which they destroy. Unfortunately, young birds are as acceptable as injurious forms of life. Wheat and other cultivated grains are taken as food but it has been found that seeds of bind-weed, wild sunflower and pigweed are also taken. It seems to be a rather remarkable fact that the animal matter in the food is eaten immediately and only plant matter or that which will not spoil is carried away to be laid up for use when food is not so abundant. Bailey showed this by pointing out that the cheek pouches usually contained plant matter while the stomachs con- tained food which could not be successfully stored. The striped spermophile is considered a quite successful fighter and apparently does not hesitate to attack and kill mice as well as smaller forms of animal life. At the hands of its enemies it shares no better fate itself for it is considered legitimate food by hawks, cats and other 4 NATURE-STUDY REVIEW [14:1— Jan., 1918 animals of prey. Those which are fortunate enough to escape a violent death retire to their burrows sometime in September. They close the entrances of their home and retire for a rest of over half a year. In view of the fact that they are deprived of what is to some the most pleasant part of the year, it is little wonder that they must live an excessively active life while they can. The food which supports them during their period of greatest activity is largely injurious to man's interest. Aren't they entitled to a little wholesome grain to satisfy their hunger in the early spring when other food is scarce ? The little family which I had watched with so much pleasure was successfully broken up by the campus cat. I arrived one day just in time to see the last of the young ones caught as it came up out of its burrow to see if everything was safe. In looking up some references in connection with this article, I was glad to learn that these squirrels are often infected with internal parasites which are also parasitic and very often fatal to cats. If those which lived outside my window were so infected I feel that at least they did not live in vain. I only wish that they might have died early enough to save the myrtle warbler, the young rose-breasted grosbeak and a number of robins which I saw meet their fate at the claws of their common enemy. An Animated Ten-pin Animal Tracks Robert W. Hegxer The University of Michigan The suspicious nature of wild animals and their keen senses of sight, smell and hearing make it difficult under ordinary circum- stances to study them in their native haunts. Everyone is familiar with the fact that a much larger number of birds are heard than are seen by bird students and that an approximate idea of the bird life of a locality can best be obtained by noting the number and kinds of bird songs as well as by observing the birds themselves. The fur-bearing quadrupeds (mammals) are even more difficult to find and since they do not sing and seldom make any sound at all some other method must be sought by means of which their num- bers and kinds may be estimated. The solution of this problem lies in the study of animal tracks, and just as the songs of birds add to our enjoyment while in the fields and woods so the study of animal tracks contribute to the pleasure that we may derive from trips afield. An animal track may be defined as the imprint of the foot of an animal in the snow or ground. When a number of tracks follow each other in succession they form what we may call a trail. Snow is by far the best medium for the making of animal tracks. Next in importance are wet sand, clay, and mud. The tracks are of course only temporary since the melting of the snow or an addi- tional covering of snow sooner or later destroys or hides them. Tracks made in clay or mud last longer unless they are washed out by rain. Impressions made in light, dry snow may disappear in a few hours and like the daily newspaper must be read the day they are made if they are to be of any value. On the other hand, the tracks of a deer in wet snow may last for weeks or even months and are comparable to our weekly or monthly journals. The best time to study tracks is therefore in the winter after a fresh fall of snow. In the summer the banks of lakes, ponds or streams should be fre- quented especially after a rain, thus insuring fresh, clear tracks- Signs are also of importance in determining the character of the fauna in any region since bear logs, blazed trees, bearer stumps, and the excrement of animals serve to indicate the presence of many species just as certainly as if the animals that made them had actually been seen. In fact a science has grown up from the study of animal excrement known as scatology. 6b 6\) ft » 'a 60 6Q dO oo 00 n r V h •a* M" 0 7ok 7?n.nru'n