I recall reading a Creation book that had the example of the woodpecker. It has all sorts of things specialized for getting insects out of wood. A long beak. A long tongue. Reinforced cranium to support the beating. Extra shock absorbing material in other places., etc. I suppose some things could evolve individually, but it would seem that the long tongue and the long beak would need to happen at the same time. The odds of that based on random mutations (most mutations are bad) would be really high.
A lot of mutations are caused by flaws in one member's DNA but the recipient mutated member never survives, thus allowing the pure species DNA to continue on........
Just think of how many species of birds are similar to each other but yet never cross breed due to the hard wiring of their own specific dna that prevents them from being attracted to that slightly different species..........