The eastern bluebird lays the smallest blue egg – approximately 4/5 of an inch – of all the songbirds that lay blue eggs. The eggs of western and mountain bluebirds are slightly larger than the eastern bluebirds, but smaller than the eggs of robins, blue jays, starlings, thrushes and catbirds.
It's rare to find bluebird eggs in an open nest, as bluebirds typically build their nests in a cavity. Blue eggs are also commonly laid by sea-dwelling birds. Larger, blue-green eggs are laid by great blue herons, little blue herons and snowy egrets and great egrets. Cormorants, skimmers and common murres lay eggs that range in color from blue to ivory.Learn More
A female swan is called a pen. Its male partner is called a cob. The pen's offspring that is one year or younger is called a cygnet.Full Answer >
Ospreys eat fish almost exclusively, with fish accounting for approximately 99 percent of their diet. Ospreys feed on fish that range in size from 10.6 ounces to 4.4 pounds. They're not picky fish eaters, and they feed on virtually any type of fish that isn't too small or too large.Full Answer >
According to PawNation, all birds have feathers, lightweight skeletons, beaks, a four-chambered heart and also lay eggs. Birds are warm-blooded vertebrate that have two legs used for walking, hopping, running or perching. Birds have a unique communication system for courtship behavior, community cooperation, chick-parent recognition and territorial defense.Full Answer >
Domestic ducks can eat chicken layer feed supplemented with brewer's yeast. Adding 5 percent brewer's yeast to chicken feed helps provide ducks with the right amount of niacin to grow properly. Ducks can also eat commercial-quality duck feed if it is available.Full Answer >