. The Canadian field-naturalist. 1963 Blood: Behavior of a Bighorn Herd 91 100 80 UJ > o < 60 40 -. 20 NUMBERS OBSERVED 10 32 94 103 162 202 265 175 148 104 34 106 133 116 141 87 42 49 172 89 Dec Feb 7,8,9 10 II . 12 . I . 2 3 4 5 6 I I I Figure 5. Activity rhythm of bighorns in M^inter from shortly after dawn until nightfall. December and February observations were both made at the same site. 1960 was made on October 10; however, an attempted nursing was observed on December 6. Lambs appear to be weaned by the time they are five or six months old. Diurnal Activity Bighorn shee
. The Canadian field-naturalist. 1963 Blood: Behavior of a Bighorn Herd 91 100 80 UJ > o < 60 40 -. 20 NUMBERS OBSERVED 10 32 94 103 162 202 265 175 148 104 34 106 133 116 141 87 42 49 172 89 Dec Feb 7,8,9 10 II . 12 . I . 2 3 4 5 6 I I I Figure 5. Activity rhythm of bighorns in M^inter from shortly after dawn until nightfall. December and February observations were both made at the same site. 1960 was made on October 10; however, an attempted nursing was observed on December 6. Lambs appear to be weaned by the time they are five or six months old. Diurnal Activity Bighorn sheep are largely diurnally active. One exception was apparent during this study. On two occasions during the rutting season the crashing reports of fighting rams were heard from one to two hours after nightfall. Activity appears to begin at dawn. General observation of the herd suggested that feeding periods alternated with periods of rest and loafing for any particular group. However, groups of various sizes were commonly seen either resting or feeding at all times of the day. When fairly large bands were observed feeding there usually were one or more individuals bedded down among them and conversely other groups were observed in which all but a few sheep were resting. This applied to both ram and ewe groups. To determine whether any general pattern of daily activity rhythm could be found, and if so, the number of feeding and resting periods involved, activity data were recorded from dawn until dark on two winter days. The data. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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