Search results
Results from the WOW.Com Content Network
A female mallard duck incubates her eggs. Egg incubation is the process by which an egg, of oviparous (egg-laying) animals, develops an embryo within the egg, after the egg's formation and ovipositional release. Egg incubation is done under favorable environmental conditions, possibly by brooding and hatching the egg.
A Senegal parrot chick at about 2 weeks after hatching. The egg tooth is near the tip of its beak on the upper mandible. Borneo short-tailed python (Python breitensteini) hatchling with egg tooth visible A painted turtle hatchling with an egg tooth. An egg tooth is a temporary, sharp projection present on the bill or snout of an oviparous ...
Diseases can be avoided with proper maintenance of the feed and feeder. A feeder is the device that supplies the feed to the poultry. [8] For privately raised chickens, or chickens as pets, feed can be delivered through jar, trough or tube feeders. The use of poultry feed can also be supplemented with food found through foraging. [9]
The span between precocial and altricial species is particularly broad in the biology of birds. Precocial birds hatch with their eyes open and are covered with downy feathers that are soon replaced by adult-type feathers. [17] Birds of this kind can also swim and run much sooner after hatching than altricial young, such as songbirds. [17]
Female birds are able to produce more of a certain gender of birds that are more likely to survive under extreme conditions. In birds, the females' egg determines the gender of the offspring, not the male's sperm. In zebra finches, a study showed the effect of food on gender ratio production. For females, egg production is a metabolically ...
The motile larvae, after swimming out of the mouth, migrate down to the disk and become fixed there until they become little anemones, ready to move and feed independently. In Darwin's frog (Rhinoderma darwinii), the female lays about 30 eggs and then the male guards them for about two weeks, until they hatch. The male then takes all the ...
Altricial means that the young hatch naked and with their eyes closed, and rely totally on their parents for feeding and warmth. Precocial hatching are feathered when hatched, and can leave the nest immediately. [22] In birds, such as the bobwhite quail, hatchlings' auditory systems are more developed than their visual system, as visual ...
Aylesbury ducks fatten quickly and by eight weeks after hatching weigh up to 5 pounds (2.3 kg), large enough to eat but still young and extremely tender. [10] Consequently, their meat came onto the market from February onwards, after the close of the game season but before the earliest spring chickens were on sale. [6]