|Sparrow gathering nest material. Nikon D7000|
I captured this sparrow today in the act of gathering material for its nest.
I am always amazed how the birds just know through instinct of good methods to construct strong nests to keep their eggs safe and warm in.
Evolving the shapes of legs, wings and beaks is one thing, but evolving genes to control brain wiring is really quite amazing.
I wonder what the nests of the first animals that laid eggs looked like; my guess is it was just a dint in the ground that did not make their bum hurt, rather than a true nest to cushion and insulate the eggs.