<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
  <Image Source="fly.png">
    <Image.Triggers>
      <EventTrigger RoutedEvent="Image.Loaded">
        <EventTrigger.Actions>
          <BeginStoryboard>
            <Storyboard>
              <DoubleAnimation Storyboard.TargetProperty="(Canvas.Left)"
                From="0" To="500" Duration="0:0:3"/>
              <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(Canvas.Top)"
                Duration="0:0:3">
                <DiscreteDoubleKeyFrame Value="0" KeyTime="0:0:0"/>
                <DiscreteDoubleKeyFrame Value="200" KeyTime="0:0:1"/>
                <DiscreteDoubleKeyFrame Value="0" KeyTime="0:0:2"/>
                <DiscreteDoubleKeyFrame Value="200" KeyTime="0:0:3"/>
              </DoubleAnimationUsingKeyFrames>
            </Storyboard>
          </BeginStoryboard>
        </EventTrigger.Actions>
      </EventTrigger>
    </Image.Triggers>
  </Image>
</Canvas>