Period 6 Code 8 Owl Pellet Project Introduction Comparative Question Do owls in the north or south of the US eat more voles HypothesisPrediction Since voles like to live in open grasslands the north has a larger population of voles The north of the US has several grasslands wh ID: 604374
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Slide1
By Ellen LeePeriod 6 Code 8
Owl
Pellet
ProjectSlide2
Introduction Slide3
Comparative Question:Do owls in the north or south of the U.S eat more voles?
Hypothesis/Prediction:
Since voles like to live in open grasslands, the north has a larger population of voles. The north of the U.S has several grasslands, which means there are numerous amount of voles. If there is a high population of voles there would be a high population of owls hunting for their prey.
Slide4
Method Slide5
Prey Animal and Assembled Skeleton
Townsend Vole
(Microtus Townsendii)Slide6
Graphs
Slide7
Data Tables
Animal
Vole
Pocket Gopher
Mouse
Shrew
Rat
Bird
Mole
Total
# found
49
10
2
1
0
1
0
63
Percent
78%
16%
3%
2%
0%
2%
0%
100%
Exterior of pellet
Prey Animal Found
Number of Each
Non-Prey items found (if any)
Length (cm)
6 cm
Vole
1
Height (cm)
2 cm
Mouse
2
Width (cm)
6 cm
Mass (g)
7 g
Table 1: Personal Owl Pellet Data
Table 2: Types of Prey Animals per Pellet Period 6 ResultsSlide8
Data Tables
Prey Animals per pellet
1
2
3
4
5
6
7
>8
Total # of pellets in class
Total # prey animals in class
Number of pellets
1
8
5
4
3
0
0
0
21
63
Percent
5%
38%
23%
19%
14%
0%
0%
0%
100%
100%
Table 3: Number of Prey Animals per Pellet Period 6 Results:
Animal
Vole
Pocket gopher
Mouse
Shrew
Rat
Bird
Mole
Total
# found
260
27
374030
331Percent
79%
8%
11%
1%
0%1%0%100%
Table 4: Types of Prey Animals Found in Owl Pellets Entire Grade ResultsSlide9
Data Tables
Prey Animals per pellet
1
2
3
4
5
6
7
>8
Total # of pellets
Total # of prey animals in class
Number of pellets
8
30
32
20
11
4
0
1
106
331
Percent
8%
28%
30%
19%
10%
4%
0%
1%
100%
100%
Table 5: Number of Prey Animals per Pellet- Entire Grade Results
Average number of prey animals per pellet (mean)
Type of prey animal contained by most pellets (mode for Table 4)
Number of prey animals contained by most pellets (mode for Table 5)
Lowest to highest number of prey animals in one pellet (range)
3
vole
3
1-8
Table 6: Entire Class StatisticsSlide10
Data Table & Graph: Comparative Question
Barn Owls in North Eating Voles
73.2%
Barn Owls in South Eating Voles
63.4%Slide11
Discussion Slide12
ConclusionSlide13
Personal Reflections
I had so much fun with this experiment of dissecting owl pellets! I thought this whole procedure was very interesting. My favorite part of the project was assembling my prey skeleton, although it was a pain when I had missing bones! I hope the future sixth graders will enjoy and cherish this project as much as I did.