Question

ducks unlimited helps sample duck species across the united states. samples from one particular location for the last two years are shown below. which duck population seemed to hold steady?
duck pond samples

	2010	2011
wood duck	11	wood duck	12
green wing teal	19	green wing teal	34
american widgeon	24	american widgeon	29

american widgeon
green wing teal
mallard
wood duck

Explanation:

Step1: Calculate population change for Mallard

$73 - 58=15$

Step2: Calculate population change for Wood Duck

$12 - 11 = 1$

Step3: Calculate population change for Green - Wing Teal

$34 - 19=15$

Step4: Calculate population change for American Widgeon

$29 - 24 = 5$

Step5: Compare changes

The Wood Duck has the smallest population change.

Answer:

Wood Duck