If you have both mourning doves and Eurasian collared-doves visiting your backyard, you have a great chance of witnessing the different manners in which they drink water.
If you carefully watch a mourning dove drink, like most other birds, it scoops water up into its bill and then lifts its head back to allow the water to trickle down its throat.
In comparison, the Eurasian collared-dove keeps never lifts its head down while it is seemingly drinking water through a straw. This many not seem like much, however, it is something most other birds are unable to accomplish.
It is amazing what you can learn about bird behavior in your backyard. To me, watching the behavior of the birds that visit our yards adds a whole other dimension to backyard birding.