their bones are hollow.
Birds can fly because they have feathers that enables them to fly. That, and having hollow bones, being lightweight and flapping their wings to propel them through the air.
Having or resembling feathers.
No. Any animal with feathers is a bird.
Pteronophobia
Yes, there are some disadvantages to having feathers. They can be prone to damage from environmental factors, such as water, which can weigh them down and hinder flight. Feathers also require regular maintenance, as birds must preen them to keep them clean and functional. Additionally, feathers can make birds more visible to predators, especially in certain habitats.
The feathers "take up more room" than the lead. It would be hard to compress the feathers to make them as dense as lead. The feathers have more volume.
It is very likely that all dromeosaurs (the clade to which Deinonychus belonged) had feathers, although for Deinonychus specifically none have ever been found. It is known for a fact that very closely related dinosaurs were feathered and therefore Deinonychus probably was too.
Birds are unique in having feathers; no other modern vertibrate have them, birds are also unique in having a furcula - a wish bone. The therapod dinosaurs had both feathers and wish bones, and it is believed that modern birds evolved from therapods.
enables a country to trade
thre greathorned owl
All birds have a body covering of feathers. It is sometimes referred to as the bird's plumage.These feathers may be different in structure, depending on the species, but having a body covering of feathers is one of the defining characteristics of birds.
The chief advantages of having a Saving Bank Account are 01) It enables to save money.02) It develops the habit of Saving.03) It enables us to deal less in physical cash.