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Barn Owl Investigation By Alex BJ Period 6 code 2.

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Presentation on theme: "Barn Owl Investigation By Alex BJ Period 6 code 2."— Presentation transcript:

1 Barn Owl Investigation By Alex BJ Period 6 code 2

2 Introduction

3 A few types of owls Barn OwlBarred owlBurrowing owlEagle owl Elf owl Great horned owl Great grey owl

4 Common Barn Owl prey types VolePocket GopherMouseShrew RatSongbirdMoleBat

5 Comparative question More birds are eaten by barn owls in the southern U.S.A. Are more birds eaten by Barn Owls in the northern United States, or in the southern United States? Prediction

6 Procedure

7 Pocket Gopher (skeleton)

8 Pocket Gopher (living)

9 Data tables (6th period) AnimalVolePocket gopher mouseShrewRatBirdMoleTotal # found percent77.8%15.9%3.2%1.6%0%1.6%0%100% Types of prey animals found in Owl pellets Number of Prey Animals Per Pellet Prey Animals per pellet and over Total # of pellets in class Total # of prey animals in class # of pellets Percent4.7%38.1%23.8%19%14.3%0% 100%

10 Data tables (whole grade) AnimalVolePocket gopher mouseShrewRatBirdMoleTotal # found percent77.8%15.9%3.2%1.6%0% 100% Types of prey animals found in Owl pellets Number of Prey Animals Per Pellet Prey Animals per pellet and over Total # of pellets in class Total # of prey animals in class # of pellets Percent7.5%28.3%30.2%18.8%10.4%3.8%0%.9%100%

11 Data table (whole grade extended) Average # of prey animals per pellet (mean) Type of prey animals contained by most pellets (mode for grade type of animals in owl pellet) Number of prey animals contained by most pellets (mode for grade # of prey animals per pellet) Lowest to highest # in one pellet (range) 2.720None7

12 Graphs for grade

13 Comparative question Graph and Data table # of birds eaten in Northern United states by Barn owls (average) # of birds eaten in Southern United states by Barn owls (average)

14 Discussion

15 Conclusion


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