Nature binoculars are useful for carrying with you when out in nature. They’re light enough for you to carry them all day, but not so small that they’re too dim in low light conditions.
Nature binoculars typically have a magnification of between 7 and 10. This means the image will be stable when you hold the binoculars in your hand. They also have typical aperture of between 30mm and 50mm. This means they will be bright enough to use in twilight but not too heavy to carry.