Poets William Cullen Bryant need to include features and details that indicate age, occupation, and gender in the poem "The Gladness of Nature",

Age:

The poem does not explicitly mention the age of the speaker or any other characters, but the tone of the poem suggests a sense of maturity and wisdom. The language used is sophisticated, and the descriptions are detailed and vivid, indicating an experienced and knowledgeable perspective.

Occupation:
Once again, the poem does not explicitly indicate the occupation of the speaker or any other characters. However, the speaker's descriptions of nature suggest a deep appreciation and love for the natural world. The language used suggests that the speaker is someone who is introspective, contemplative, and in tune with their surroundings.

Gender:
The poem does not explicitly state the gender of the speaker or any other characters. However, there are no indications in the language used that would suggest a particular gender. The speaker's descriptions of nature are universal and could be seen as coming from anyone who appreciates the beauty of the natural world. The poem celebrates the inherent joy and gladness that can be found in nature, transcending gender distinctions.