Mocking bird facts

Some types of mockingbirds are known to lay "alien eggs", or eggs that are laid in another bird's nest. Similar to the cowbird, the mockingbirds' offspring will force the other nest inhabitants from the nest, taking all the food from the parents and forcing the foster-parents to rear and fledge them.

When the survey voyage of HMS Beagle visited the Galápagos Islands in September to October 1835, the naturalist Charles Darwin noticed that the mockingbirds Mimus thenca differed from island to island, and were closely allied in appearance to mockingbirds on the South American mainland. Nearly a year later when writing up his notes on the return voyage he speculated that this, together with what he had been told about Galápagos tortoises, could undermine the doctrine of stability of species. This was his first recorded expression of his doubts about species being immutable, which led to his being convinced about the transmutation of species and hence evolution.



Thoughts 

-Maybe mockingbirds are less innocent to how they initially seem-could this refer to the children etc?
-Foster parents could relate to Truman, a great friend of Lee.
-Influential animal, in evolution terms. 
-Black vs white