An example of gradualism is

the variation of tortoise shells that evolved as tortoises lived on different islands with different habitats

slow evolution of whales from a four legged land mammal over millions of years

rapid speciation following a catastrophic event

separate evolution of flight in birds and bats

over different geological eras.

An example of gradualism is the variation of tortoise shells that evolved as tortoises lived on different islands with different habitats.