Yes, warblers is an easy one to pick out of the crowd. But the trick about Evolution is that little fishies don't just explode into primates .... for big changes, there has to be a consistent chain of big environmental changes to nudge the population's genetic profile along.
So instead of looking at birds, living like birds, and wondering why these birds, don't become something else, we have to look animal case histories where a continuous population made several fortuitous moves into a new environmental niche - - to exploit food resources, to evade predators or both!
So that's why we need to discuss the connection between Hippos and Whales! It turns out that the closest living relatives to Hippos (the last surviving member of it's branch in the tree of life) are whales!
Genetically, physiologically and anataomicaly, the case is a convincing one:
1) Hippos and Whales have similar physical traits such as hairless skin, a lack of conventional sweat glands, and a thick layer of blubber.
2) Both hippos and whales can nurse their young fully submerged.
And most dramatically, anatomical comparisons show an unusually similar similarity between Hippo ankle bones, and the still-existing ankle bones of proto-whales!
"....recent fossil discoveries have borne out [a] prediction [based purely on Evolutionary hypotheses]. Scientists found ancient whales with hind legs and pelvises: these whales had the same kind of double pulley ankle bone that modern pronghorns, camels, cows and hippos have."
So, @Dredge, quit waiting for a magician to put a mouse in a hat, and expecting a rabbit to jump out. If you want to find dramatic change, you have to find populations that have experienced dramatic changes in their environment.
For example, one of the reasons why Bears are such good climbers is because they used to be a lot smaller, and they spent most of their time in the tree tops to avoid predators. As their territories changed, and bears became bigger (and badder) over time .... they became the dominant predator. But their paws are still configured for excellent tree climbing....
This is not what you would expect if God created Bears separately from all the other forest creatures.