beak shape eye position feather pattern tail-feather length
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A birdwatcher wants to identify an eastern bluebird. What feature of a bird should the birdwatcher evaluate first to identify an eastern bluebird?
Possibilities:
- beak shape
- eye position
- feather pattern
- tail-feather length

feather pattern