Low-key photography is a style characterized by its use of shadow and darkness, creating images that are predominantly dark with limited lighting. This style often conveys a sense of mystery, moodiness, or drama. The contrast between the light and dark areas is typically high, and the lighting is carefully controlled to highlight only specific parts of the subject. Here are some suggestions for low-key photography in nature:

• Moonlit Landscapes: Capture landscapes under the light of the moon, where most of the scene is shrouded in darkness but key features are illuminated by the moonlight.

• Sunset Silhouettes: Photograph trees, mountains, or animals against the backdrop of a setting sun. The subjects will be silhouetted, creating a strong contrast against the fading light.

• Forest in Twilight: The natural darkness of a forest, especially during twilight, can create a mysterious and moody setting. Use a light source to illuminate just a part of the scene.

• Stormy Skies: Capturing the dark, brooding skies of an approaching storm can create powerful low-key images. The contrast between the dark clouds and any available light can be very dramatic.

• Night Wildlife: Photographing nocturnal animals with a focused light source can create striking low-key images. The animal can be lit while the surrounding environment remains dark.

• Macro Nature Shots: Close-up shots of nature elements, like a single leaf, a flower, or an insect, with a dark, unfocused background can create a beautiful low-key effect.

For low-key photography, the aim is to use minimal lighting strategically to illuminate only certain parts of the subject while keeping the majority of the scene in shadow. This often involves using spotlights or off-camera flashes and experimenting with different angles and intensities of light. The use of dark backgrounds and the avoidance of reflective surfaces also helps to achieve the low-key effect. 

High-key photography is a style that involves using a lot of light to create a bright and airy image, with minimal shadows and low contrast. It often results in a photo that feels light, ethereal, and optimistic. This style is characterized by a dominance of light tones and reduced darker tones. Here are some suggestions for high-key photography in nature:

• Flowers and Blooms: Light-colored flowers, such as white or pastel roses, lilies, or cherry blossoms, are excellent subjects. The natural lightness of the petals can be enhanced to create a delicate, dreamy effect.

• Snowy Landscapes: A fresh snowfall offers a naturally high-key environment. Capture the untouched snow under bright sunlight or on a cloudy day to emphasize the whiteness and purity of the scene.

• Beach Scenes: Sandy beaches under bright sunlight can be perfect for high-key photography. The reflective nature of sand and water can help create a bright, high-key effect.

• Sky and Clouds: A sky filled with light, fluffy clouds can create a beautiful high-key image. The contrast between the white clouds and the light blue sky can be minimized to enhance the high-key effect.

• Feathers and Wings: Birds or close-ups of feathers, especially those that are light in color, can be great subjects. The delicate texture of feathers can be accentuated in a high-key setup.

• Remember, the key is to use a lot of light, overexpose slightly, and minimize shadows to achieve that high-key look. It's also helpful to use a light or white background to enhance the effect.