Read and understand the fifth sentence of the first paragraph and the first sentence of the sixth paragraph in Zheng Zhenduo's "Cormorant". What characteristics of the cormorant are reflected in the fifth sentence of the first paragraph and the first sentence of the sixth paragraph?

It reflects the cormorant’s graceful posture and vertical standing posture.

Excerpt from the original text:

A dozen gray-black cormorants stood on the side of the ship, like soldiers lined up waiting for orders.

When the cormorants were full, they stood neatly on the side of the ship like soldiers. The fisherman took up his oars and rowed the boat back.

Often in small groups. He is good at swimming and diving. When swimming, he stretches his neck straight upward and tilts his head slightly upward. When diving, he first half jumps out of the water, then turns over and dives underwater. Feeds on a variety of fish. Mainly hunts by diving.

Habitat

Inhabit rivers, lakes, ponds, reservoirs, estuaries and their swamps. They often rest on rocks or branches to dry their wings. Wild cormorants usually inhabit rivers and lakes, and in summer they nest on rocky cliffs or tall trees near water, or in dwarf trees in swamp lowlands. Not very afraid of people. Often active at the seaside, lakeside, and among fresh water.

Most common cormorants are resident birds, especially the populations that breed in southern China and generally do not migrate; the populations that breed north of the Yellow River generally migrate to areas south of the Yellow River or the Yangtze River to overwinter in winter. In spring, the time to migrate to the northern breeding grounds is generally late March and early April, and in autumn, they usually start to migrate away from the northern breeding grounds in late September and early October and migrate to the southern wintering grounds. They often gather in small groups during migration, and sometimes there are large groups of nearly a hundred individuals.