Animal C S I: Critter Scene investigation · 11/22/2014 · •Forensic Science –The application...
Transcript of Animal C S I: Critter Scene investigation · 11/22/2014 · •Forensic Science –The application...
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Animal C S I:
Critter Scene investigation
Kelley Reetz - Brugmann
Interpretive Specialist/ Scat Expert
Saturday, November 22, 2014
National Association for Interpretation
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Session Learning Outcomes
• You will participate in and assess fun-filled educational and recreational activities that support open space and natural resources.
• You will understand the steps needed to develop an interactive CSI program for urban, open space or historic park setting.
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Our Next Hour
• CSI: What is it?
• Wildlife in Our Parks
• Park Design with Wildlife in Mind
• Quick Rules and Regulations
• Tips, Tricks and Techniques for CSI
• Critter Scene Investigation Stations!
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Introduction to
Critter Scene Investigation
WHERE did you find it?
WHAT does it look like?
WHEN did this happen?
WHY has this occurred?
WHO do you think left it?
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vocabulary
• Forensic Science – The application of all forms of science to aid legal
investigations.
• Forensic Scientist – A person who uses forensic science to solve crimes.
• Physical Evidence – Any object relevant to the crime.
• Wildlife Forensics – Forensic Scientists use the same methods and tools
for wildlife crime as used in crime against people.
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Wildlife in Urban Parks
• Bats in palm trees
• Hawks nesting in sports lights or roofs
• Migratory Birds near lakes, ponds, pools
• Woodpeckers in rafters
• Coyotes cruising around
• Found along our trails
Photo @ Steve Winter/National Geographic
Photo @ Sea & Sage Aubudon
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Quick Rules & Regulations
• Migratory Bird Act – must leave the birds alone!
• Red-eared Sliders at cultural celebrations
• Rabbits at Easter
• Desiring baby animals in spring time
• Animal Collections (tarantula, tortoise or horned lizard)
• Coyote packs roaming parks
• Concern of rabies from wildlife
• Hantavirus – tight quarters in restrooms, children’s play area
• ALL TEACHABLE MOMENTS
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Park Design with
Wildlife in Mind
– Assistance: Bat boxes, hollowed/fallen trees, revegitated culverts, habitat vegetation cover (non-maintenanced)
– Pollution Concerns: Noise, Water, Light
– Prevention: dog park zones, poop bags, trash cans covered, recycle bins
– Signage: regulatory (ordinances), interpretation, Do not feed, Speeding
– Camera Monitoring: Who’s where
Areas for Wildlife, Areas for Humans?
Photo @ National Park Service
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Wildlife Monitoring
Cameras
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The Clues in Pooh
Tricky Tracks
Guts and Glory
Bone Basics
CSI Station Reviews
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The Clues
in Pooh
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Step 1: Examine Shape and SIZE
The size of the scat can help us assume the size
of the animal.
Shape matters!
Twists
Tubular
Pellet
Oblong
Blunt ends
Pointed ends
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Step 2: Review Color and content
The color and content can tell us if we are dealing with an
herbivore, carnivore or omnivore.
We can also age the scat, too!
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Step 3: Examine location
The location can help to determine which critter
deposited the pile.
Where is it located?
- On a rock
- In the grass
- Scattered
- Partially buried
- In a latrine
- By a water source
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Tricky
Tracks
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Tracker’s clues
Clear track Pattern Pressure
Release
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Step 1: Clear tracks
Investigate the clues of Clear Tracks:
- Symmetry
- Nails
- Toe Pad Shape
- Number of Toes
- Placement of Toes
- Fur
- Metacarpal Pad Shape (palm)
- Heel Pads
- Negative Shape
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Step 2: Examine Pattern
Types of animal movement
Trot
Bound Pronk
Walk
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Step 3: Examine Pressure Release
Pressure release is the disturbances in the soil in and around the track.
Pressure release creates mountains and valleys in the dirt.
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Guts and Glory
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What are you examining? Is it gooey, moist, smelly, stiff, old, does it have invertebrates on it?
Step 1: Examine the Parts
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Step 2: Why only Guts?
Why are there a only guts?
Where are the other parts of the body?
Why isn’t there blood?
What animals might be eating what is currently viewed?
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Step 3: Analyze Surroundings
Are there any drag marks to or from the site?
What hidden areas are close by, offering predator protection?
Are there any pieces of the prey that can give insight to what specie it was?
Gut piles are fabulous indicators of carnivorous behavior.
Enjoy from a distance –
nature’s nuggets may contain harmful bacteria.
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Step 4:
Owl Pellet
vs. Puke
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Bone Basics
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Step 1: Examine The critter Scene
- What bones are present?
- Is there any way to tell if this is a new or old critter scene?
- What condition are they in?
- What other evidence do you see?
- Is there a “secondary critter scene”?
- Figure out which bones are present.
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Step 2: Examine The Body Bones
- What bones are there? Long Bones? Rib Bones? Pelvis? Feet or Hands?
- What size are the bones?
Bigger or smaller than your own skeleton?
- Do you see any obvious
damage to the bones? Are they broken or chewed?
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Step 3: Examine the Skull
Investigate the following evidence:
- Shape
- Size
- Cheekbone Size (Zygomatic)
- Skull Holes Size (Foramen Magnum)
- Eye Sockets
- Teeth
- Brain Case
- Special Features (Horns or Antlers)
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Step 4: Analyze The Evidence
Can you answer any of the following questions?
- Was this animal killed by another animal?
- Was this animal eaten by another animal?
- Can the evidence in the bones tell us what happened?
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leT’s InvesTIgaTe
our Critter scenes
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Urban Wildlife Sites: Urban Wildlife, USDA:
http://www.fs.fed.us/research/wildlife-fish/factsheets/urban-wildlife.pdf
Urban Wildlife Institute, Lincoln Park Zoo, Chicago:
www.lpzoo.org/conservation-science/science-centers/urban-wildlife-institute
US Fish & Wildlife – Migratory Bird & Treaty Act
https://www.fws.gov/migratorybirds/RegulationsandPolicies
Nature Websites: Acorn Naturalists, www.acornnaturalists.com
Animal Grossology, www.grossologytour.com
Nature Watch, www.nature-watch.com
Skulls Unlimited, www.skullsunlimited.com
Resources for C S I:
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Get outside and
investigate!
Irvine Ranch Natural Landmarks www.LetsGoOutside.org
www.facebook.com/irlandmarks
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