FOR THE PEOPLE FOR EDVCATION FOR SCIENCE LIBRARY OF • THE AMERICAN MUSEUM OF NATURAL HISTORY THE OSPREY. AN Il.I.USTRATKII MoN'iiii.v M.\(;.\zim: oi-^ I^)l'^L.\K Ok \ rin()i.f)(,v, VOLUME 1. SEPTEMBER. \H'>(>. ro September, 1897. iCopyrislited.) xlitcd h\ Walter Adams Johnson, Associated with I^r. I'Jhott Coues. GALESBUKG. ILI,.: THE OSPREY COMTANY 1897. Copyrighted, 1897. (March to August inclusive.) The Osprey Company, Publishers, 61 North Prairie Street, Galesburg, 111 - -^ ■Si ^ ^ ■> w - t^ ?^ .C w r ; ■^ ■J) -^ w S THE OSPREY. An Illustrated Monthly Magazine Devoted Exclusively to the Interests of ORNITHOLOGY. Vol. 1. No. 1. GALESBURG, ILL., SEPTEMBER, 1896. $HKJ A Year A Tern Study. BY KEY. P. B. PEABODY. ST. YINCENT. MINX. A STUDY of Terns— a casual study — not of the common Hirundo. not of Maxima. Eleg^ans. Paradisca, whose beautiful forms or exquisite colors appeal so keenly to the quickened senses. under the deli- cious air of ( Spring-, nor yet of j our dear little pearl-and-eb o n y "Water Swal- lows," of "(tuH- like form," who. about the l<»th of May (in latitude St. Paul 1 comes wheeling- and roll- ing- in compact flocks, like well drilled soldiers, marching- in mid- air, along- the marshes, with many a g-raceful simultaneous dip, waterward. and an incessant, mu- sically strepitant, **chilt"-ing^ cho- rus— but just a study of Forster's Tern — him of the black pileum and snowy under- feather, pearly white mantle and trailing- forked tail, so often mis- taken for Hirun- sota represent both Hirundo and Forsteri. It is to be doubted whether even a criti- cal eye could disting-uish them in flight, unless, perhaps, when flocking- together, if. indeed, they do flock tog-ether », this making the slig-htly greater size and tail- lenufth of Forsteri apparent. While the common Tern breeds at Dev- il's Lake, North Dakota, I do not personally know of any breeding- ground in Minne- >ota. However, cither Hirundo or Forsteri — I do not yet know which — is found at and near Mille Lacs and the neig-hbor- ing- lakes about June 1, in com- li pany with a few > p, pairs of Caspian Terns, and so, un- doubtedly breeds. I am inclined t(^ l)elieve that the Mille Lacs birds a r e C» > m m o n Terns, there be- ing- in that imme- so ::^>>^~ . >' -^"-s "-•"/,-*', V'^'^-'^' 'J^'-' W'^*i^« inii" in that imme- AV/-^^:// ^^^.^'*^*v^^ 1^ farasmvobserva- "^/ S i.x i -^ » '." vV 'aV .V - "-^ '^1^'" i^'**^^- much 7^"^^ »^ V^.W - ' • ' •«k^' ■ more of thesandv \- i'^\ ^'^^iW:/^-.' .^-xirV :, or rockv lake- mi-ir NEST OF FOKSTEK S TEKX OX Ml'SKKAT HOUSE IX HEKOX LAKE, MIXX. marg-in instead of the bog- g^y marsh expanse that seems so dear to Forster's do, and yet (to say nothing- of specific difi"erences of structure and color. > in breeding- habit as widely difl'erent. Un- doubtedly, the Terns that are seen during the Spring- migration in Southern Minne- Tern. Owx present study will deal with the rug-ged little ja^g-er as observed, dur- ing the breeding season, in Southern Minnesota, in the very notable bird j>ara- dise — Heron Lake. Little does the casual THE OSPREY. observer know about the ways of a bird. There is a strong- touch of human in the seriousness with which I have been tokl that this (and other like birds) while abundemt in summer, do not nest at Heron Lake. In truth, I once thoug-ht thus my- self! I have but two seasons' record for the Heron Lake habitat. According- to these, the Terns beg-in to arrive about April 7th, coming-, first, in sing-les or trios, then in squads, and later, in strag-g-ling- flocks that never become very larg-e. The first apparent Spring--time food consists of dead fish and frog-s and other aquatica that have perished in the win- ter ice, and are being- revealed as the lat- ter melts beneath the sun. At first the Terns creep, scout-like, on the wing-, along- the thawing- shores. Then, as heat and wind-wave melt and crush the ice- bonds of the lake, the Tern speedil}- as- sumes the hawk-like (or swallow-like) habit, wandering-, fitfulh' over the newlv released waters with eye alert, beak point- ing- downward, and with many a shrill but cheery cry of self-g-ratification or of brotherly g-ood-will. He knows not fear. As one rows iimong- the innumerable "copses" of rush and flag-, bent on reaching- the Mallard's feed- ing- g-round, a skirmish-line of Terns will wander by, twenty-, fifteen, ten feet over- head, furiously, without swerving- a wing-- breadth from their course, the one or two that are passing- eye curiously the dumb decoys in the boat's belly, and then saun- ter on with a rattling- "jeer" of derision at the hunter who toils at the oar, and who, unlike the Tern, is never quite sure of his g-ame. But then, our black-capped jseg-er hunts all day! A thoroug-hly mis-avian spirit is he. While sociable among- his kind, and, to them, moderately- g-ood-tempered (except in the breeding--time ), he is radically hos- tile to all other birds. A veritable Ish- mael among- the water-fowl, his spirit, both of courag-e and of mean cowardice, is never so clearly portra^'ed as when, by mutual encroachment upon favorable wa- ters, many species other than those of his feather flock tog-ether. I shall never forg-et one day in early May when, as the sempiternal south wind swept the wide expanse of rush and g-rass and cane along- the southern shore of He- ron Lake, I drew a heavy boat, wife and baby laden, after a stern pull across the well-nig-h drenching- waves, into a wide and sheltered ba}'. There had been, re- cently, a strong- north wind and many a raft of appetizing- flotsam lav along- the wave-whipped mucky shores. Dozens of little waders of half-a-dozen sorts were winnowing- the ooze along^ the mud-flats laid bare by the receding- waves; a sing-le King- Plover stood in petrified astonishment not ten feet from the boat's bow, innocent brig-htness beaming- from between his rounded coral eyelids; g-reat awkward companies of Nig-lit Herons went flai>ping- away in ridiculous terror; sorts of sweeping- of color; Hung-ry widely. and, overhead, as many ducks, in whilom bevies, went by. What bewildering- maze what exquisiteness of motion! black Terns were wanderinj hovering- a moment, and then lig-htlv and swiftly dropping- to touch the water for one brief instant; an occasional squadron of Franklin Gulls paused, in their dig-ni- fied processions, to hawk for a bit among- the invisible insect armies overhead; and, withal, a spiteful troop of Forstcr's Terns were scattered everywhere, expressing-, with shrillest indig-nation their resent- ment at the invasion of their favorite hunting--g-round by all this feathered troop and rabble. And very justly were they indig-nant. This was, not merely feeding- g-round, but breeding- g-round — that is to say, if one may take a Tern's word for the extent of territory, adjacent to the breeding- spot, over which he asserts the rig-ht of emi- nent domain. Not 5U0 3"ards from the very bay is the area of watery marsh- marg-in wherein, the previous autumn, the muskrat had built their huts, and the Terns were now laying- their eg-g-s. Plodding- heavily from the waterline up the miry shore, one strikes throug-h a nar- row belt of coarse rank g-rass, g-rowing- rather in mats than in bog-g-y tussocks, with an occasional clump of flimsy willow lifting- up a weak apolog-y for existence, and, as he pushes onward, suddenly steps off into an areaof water densely islanded, in spots, with cane-bog-s and studded with g-roups of rushes and an occasional copse of cat tail, or sweet-flag-. The water in this reedy strip was at the time in ques- tion— May of 1894— from 18 to 30 inches deep, to say nothing- of the mud! On the 2bth of May, I beg-an to explore THE OSPREY. this moss tract, intent on man^- thing-s — but never dreaminjif that I should find the breetlinj^ places of my Terns. The Yellow-heads, aixnit to build, were noisily solicitous, everywhere, and very busy. The habitants of the Nig-ht Ilertm- rv < which covered ten acres or more anion »^ tile canes), were hawking- overhead and all about, from their nests and hidin*^- places. A spur of the heronry, which lay several hundred yards to the southwest, abutted into the area of which 1 am speak- in«>;-. This spur consisted of a very nar- row ridiife (say ten feet wide, ) of hijjfher marsh, a reefy remnant, perhaps, of a once extensive cane-bo<4" lon<4- since