Remove adult ewes - Nevada Department of Wildlife · • NDOW’s Definition of a Ewe “Anyfemale...
Transcript of Remove adult ewes - Nevada Department of Wildlife · • NDOW’s Definition of a Ewe “Anyfemale...
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• Remove adult ewes
• Keep the herd size within the habitat’s carrying capacity
• Reduce the risk of disease events with lower density of animals
• Manage sustainable bighorn sheep herds
Goal of Nevada’s Bighorn Ewe Hunts
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• Help tagholders have a successful hunt
• Teach bighorn hunters to recognize the differences between ewes, yearling rams, and ram lambs
o Horn size and shapeo Physiological differences between ewes and
rams
• To test your knowledge through a series of “quiz” slides at the end of the presentation
Purpose of this Presentation
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• NDOW’s Definition of a Ewe“Any female bighorn sheep having a horn or horns of at least 5 inches in length each as measured on the outside curve of the horn from the skull to the tip” (NAC 503.345)
• This definition specifically targets adult ewes and is designed to prevent yearling rams and ram lambs from being harvested
• During the hunting season, ewes will be in “ewe groups” typically consisting of: o ewes of all ageso current year lambso a few young rams (yearlings, 2, 3 & 4 year olds)
What’s a Bighorn Ewe?
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Ewe CharacteristicsNarrow horn base, sickle (crescent) shaped
Ears = 4 to 4 ½ inches
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Ewe Characteristics
Multiple rings indicating adult ageUrination Posture (primarily squat rear legs)
Ears = 4 to 4 ½ inches
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Yearling Rams
Wider horn base, wider than the eye
Larger pronounced forehead
Testicles and belly spot or penis
Urination posture (primarily stretch legs)
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Ram (male) lamb CharacteristicsHorn base wider than the eyeDarker gray horns than ewesUrination Posture (squat rear legs)Belly spot or penis and testicles
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Base of ewe horn is roughly the same width as the eye.
Notice base of horn is much wider than width of eye
EweYearling Ram
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Belly spot or penis
Note size difference and shape in base of horn• Ewes have a sickle (crescent) shape• Rams have a triangular shape
Ram
Ewe
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Rear View to See Testicles
• When in doubt as to gender, be patient and wait for a rear view of the animal. Keep in mind, that testicles on ram lambs are not as easy to see.
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If in doubt…DON’T shoot. Horn length is questionable.
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QuizWhat is
each animal?
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Yearling Ram
Ewe
Ram Lamb
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Ram or Ewe?
How about these three?
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Ram – note width of horns and spot on belly
Ewe – note the narrow and sickle shape horns
Both of these are yearling rams. You can see the testicles and belly spot on left ram
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Which one is a ram?
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Ram – note the width of horn bases compared to eye & the length of horn.
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Ram or Ewe?
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Ram – width of horns compared to eye & visible penis.
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Ram or Ewe?
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Ewe, narrow horn base and no belly spot
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Identify these three animals.
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This is a photo taken in the summer of Rocky Mountain Bighorn.Note the wider base horns on the yearling ram and visible penis.
Yearling RamLamb
Ewe
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How many ewes can you see in this photo?
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One
Note: This is a photo taken in the Fall of Rocky Mountain Bighorn Sheep.
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• Be patient and use good optics
• Confirm which animals are ewes
• Allow your target animal to show a front, side, and rear view before taking the shot
• Look for all characteristics that define a legal ewe
• If in doubt…DON’T Shoot
Things to Remember on Your Hunt