Birds discover earthworms in the soil through a combination of visual cues and their keen sense of hearing. They may observe the movement of earthworms on the surface of the soil or detect vibrations made by the worms as they burrow underground. Some birds, like robins, are known to tilt their heads to listen for the sounds of earthworms moving beneath the soil. Once they locate an earthworm, birds use their beaks to extract the worm from the ground. **

Birds discover earthworms in the ground through a combination of visual and auditory cues. They may use their keen eyesight to spot the movement of earthworms on the ground or the surface. Additionally, they can also use their sense of hearing to detect the subtle sounds of earthworms moving through the soil. Once they have located a potential earthworm, they may use their beaks to probe and extract the earthworm from the ground. **

Birds do not see black glass, as they perceive glass as a transparent barrier. However, they may see their reflection in the glass, which can sometimes lead to collisions as they mistake it for open space. To prevent this, some buildings use bird-friendly glass with patterns or coatings that make it more visible to birds. **

Birds cannot see glass because they perceive reflections in the glass as an extension of their surroundings. This can lead them to fly into windows or glass structures, as they do not recognize the barrier. Additionally, birds have a different visual system compared to humans, which may contribute to their inability to detect glass. The transparency of glass also makes it difficult for birds to distinguish it from open space. **

Budgerigars are considered nomadic birds. They are known to move in search of food and water, and their movements are often influenced by changes in weather and resource availability. While they do not have a set migration pattern like some bird species, they are not sedentary and can cover large distances in search of suitable habitats. **

Birds do not see glass as a solid barrier because they perceive reflections in the glass as open space or a continuation of their surroundings. This is due to the way their visual system processes information, which can sometimes be misleading when it comes to transparent or reflective surfaces like glass. As a result, birds may fly into windows or glass structures thinking they can pass through them. **

It is unclear what is meant by "birds are behind birds" without further context. It could refer to birds following other birds in a flock, birds being positioned one after the other in a line, or birds being hidden or obscured by other birds. The interpretation would depend on the specific situation or scenario being described. **

Birds of prey, such as eagles and hawks, have incredibly sharp vision and can see prey from great distances. Some species of birds of prey, like eagles, have been known to spot prey from up to 2 miles away. Their keen eyesight allows them to detect movement and small details from high in the sky, making them highly effective hunters. **