Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to recognize the chickadee [title] Look at the bird's size and shape. [step] The chickadee is a very small bird. Larger birds are unlikely to be chickadees.

Ending1: It also has a specific body type to look for. [substeps] The chickadee has a sphere-like appearance due to its short neck and large head. Ending2: Most chickadees are quite large and have an egg-like crest. This crest is brightly colored and has spikes on it. Ending3: [title] Watch out for young birds that have not yet hatched or have been weaned off their parents. [step] They will most likely demonstrate similar behavior, but will have thriving populations. Ending4: Birds for beginners may look about as large as a miniature pigeon. Smaller birds may be more recognizable by having wide, almond-shaped tumps, triangular beak, and bright red eyes.

Answer format: ending1/ending2/ending3/ending4