...They hibernate in this way, comingforth again the following season to start the cycle for thenew year... 
Clarence M. Weed 「Butterflies Worth Knowing」
...If data for a large number of females were arranged as are those in Table 8, they might reveal whether the breeding cycle is annual or biennial...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...The reproductive cycle in cottonmouths resembles that illustrated by Rahn (op...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Fitch (1956:463) found that copperheads in northeastern Kansas begin their annual cycle of activity in the latter part of April, when the daily maximum temperature is about 22° C...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Indications are that in the northern part of its range the annual activity cycle of the cottonmouth resembles that of the copperhead in northeastern Kansas...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...The diel cycle of activity of cottonmouths is of necessity closely related to the seasonal cycle...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...The annual reproductive cycle of the California gull...
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...For such a distinct and regular feature in the life cycle of thespecies as the retrograde autumnal movement there must be somebiological explanation...
Francis Harper 「The Barren Ground Caribou of Keewatin」
...The spermatogenic cycle is completed in the latter half of Octoberwhen most of the spermatozoa pass into the epididymides...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...The time in which egg-clusters are deposited is a good roughindex to events in the breeding cycle...
Richard F. Johnston 「Natural History of the Salamander, Aneides hardii」
...The regularly recurring events of thisgreat cycle, or rather series of cycles, soon stamp themselves evenon the dull mind of the savage...
Sir James George Frazer 「The Golden Bough」
...Now anoctennial cycle is the shortest period at the end of which sun andmoon really mark time together after overlapping, so to say,throughout the whole of the interval...
Sir James George Frazer 「The Golden Bough」
...Whatever its origin may have been, the cycle of eight yearsappears to have coincided with the normal length of theking’s reign in other parts of Greece besides Sparta...
Sir James George Frazer 「The Golden Bough」
...For countless ages this cycle of natural events has determinedthe annual labours of the Egyptian husbandman...
Sir James George Frazer 「The Golden Bough」
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