Figure 2:

Joint bivariate probability of the rabbit (variable $X$) and wolf (variable $Y$) populations $MNV\left(\mu =\left(\begin{array}{c}20\\ 10\end{array}\right),\mathrm{\Sigma }=\left(\begin{array}{c}{7}^{2}14\\ 144^2\end{array}\right)\right)$, ${\sigma }_X=7$, ${\sigma }_Y=4$, ${\rho }_{X,Y}=0.5$, derived from univariate normal marginals. This example shows the graphical representation of $P_{X,Y}(-10<X<27\cap -4<Y<16)=0.805$.