brown-backed shrike

Contemporaneous eggs of different color types of brown-backed shrike can be smooth in the interference experiment The fertile eggs are hatched, but the out-of-phase eggs are rejected, and the basis for the judgment of the parent birds may be Egg color. There are two possible reasons for this phenomenon: one is two-color types Brown-backed shrike can distinguish out-of-phase eggs, but due to differences in the timing of ovulation Largely causes hatching and energy investment contradictions in the allocation of feeding time The second is that the two-color brown-backed shrike uses the out-of-phase eggs as parasites Egg rejection. 

Moskat & Fuisz (1999) put fake cuckoo eggs (blue Eggs with better color and imitation) are placed in red eggs during laying and early hatching. Among the back shrike nests, the coping strategies shown by the red-backed shrike include driving Eggs from abroad (71.2%), abandonment of original nests (19.2%), acceptance of foreign eggs Come eggs (9.6%), and the rejection rate of blue eggs is higher than that of eggs with better imitation; In the laying period, the eggs with better imitation are mainly abandoned, and in the incubation period.

The foreign eggs are expelled. The results of this experiment showed a phenomenon of abandoning the nest, and the performance of heterochromatic and homochromatic types is more consistent. brown-backed shrike pair nest Insensitivity to the number of mid-eggs, increased contemporaneous homochromatic eggs, or intentional or unintentional Reducing the number of eggs will not affect their nesting. But at the same time, the brown-backed shrike nest will be abandoned in the case of strong human disturbance. 

According to local villagers, the Brown-backed shrike is seen navigating the transfer of chicks in old nests during brooding to the new nest. Judging from the current situation, the white spots or white edges on both sides of the wings of birds are not It is easy to be found by natural enemies or predators, and it is easier to appear white above and below It was discovered by natural enemies, so white spots and white borders on the side of the body may play a role in the individual The effect of recognition, especially the recognition of the parent by the offspring during the feeding period. 

Book The experimental foster child chicks were nurtured normally in the foster parent's nest, and after development Follow the activities of the righteous parent and learn their behavior, its later spread and the relationship with the righteous parent The relationship needs to be further studied in the future. The sexual selection hypothesis suggests that plumage polymorphism may be due to female Preference for salient morphologies and predation pressure favoring concealed morphologies produced and maintained. In this case, the plume polymorphism reflects the relative dominance of the individual, which is correlated with the expression of bodily signals Consistent, that is, the degree of pigmentation represents different status, such as health and nutritional status. 

However, prominent patterns favorable to sexual selection may be due to high predation risk or used to produce and maintain significantly high color energy expenditure and balance with non-salient forms (Endle, 1980). A total of 21 brown type, 9 black type, and heterozygous type were found in the plot. 10, including 10 heterozygous nests, 6 black-type females, many The species-colored brown-backed shrike breeds synchronously, and there is no preference for the same species of shrike The opposite sex is paired. In summary, we included in 2006-2008 The 44 nesting birds found in the plot were brown and black broodstock. 

In the breeding nest, the ratio of black-type females to brown-type females was 20:24. From the perspective of the sexual selection ratio, the ratio is similar, and there is no large ratio. That is, females show no preference for males of different color types. from reproduction From a physical point of view, we have not been able to determine the brown-backed shrike feather machine control, maybe plumage polymorphism is not related to selection, it may be simply a neutral relationship to a physiological or ecological characteristic or non-adaptive traits (Galeotti, 2003) Both color types are absent in both reproduction and brooding during the reproductive process Isolation occurs. 

The generally accepted concept of species holds that a species is Nature is able to mate, produce fertile offspring, and exist with its population reproductively isolated groups. Integrated reproductive isolation and morphological traits, behavior Evidence of differentiation, we support that black shrike is just one of the brown-backed shrikes Chromotype, rather than an independent species point of view. About Black Type Source and Feather Color Genetic laws and other issues still need to be investigated in the future for more different types of brown. 

The accumulation of research on Shrike individuals, from morphological, ecological, genetic Comprehensive research in multiple disciplines such as science and geography. Acknowledgments: Jiang Yanqiong assisted in the completion of the control experiment of easy eggs and easy chicks work, the Guangdong Haifeng Bird Nature Reserve provided the Thank you for your help!

Bird that sounds like a turkey?

Please write an article about what bird sounds like a turkey. A lot of people think that turkeys sound like they’re gobbling or clucking but there are actually many different types of birds that sound like turkeys. Some birds have a deep voice while others have a high pitched one. There are also some birds that sound more like ducks than turkeys. You can learn more about these birds by writing an article on them.

The blackbird is a songbird, which means it sings and makes music. It is found in most parts of the world except Antarctica. Its name comes from its black coloration. They live in trees and bushes. Their songs are often described as “liquid notes” because of their musical quality.

The great tit is a common European passerine bird. It is a member of the family Paridae. It is known for being very social, and will often form flocks. This bird is named after the great tit (Parus major). Great tits are native to Europe, Asia, North Africa, and North America.

The blue jay is a large American crow-like corvid. It is a common species throughout much of Canada and the United States. Blue jays are omnivorous, eating both plant material and animal matter. They are highly intelligent, and have complex communication systems.

The cuckoo is a brood parasite. Cuckoos lay eggs in other birds' nests, where they hatch out and raise the young as if they were their own. In return, the host parents feed and protect the cuckoo's offspring until they fledge. The term "cuckoo" comes from the Old English cucu, meaning "rooster."

The domestic chicken is a domesticated fowl, descended from the red junglefowl (Gallus gallus), which is itself a domesticated subspecies of the grey junglefowl (G. g. murghi) of Southeast Asia. Domestic chickens are raised primarily for meat, although egg production is another important factor. Chickens are commonly kept as pets, especially in urban areas.

The domestic duck is a domesticated version of the mallard. Ducks are popular as waterfowl due to their ability to swim well and dive. They are usually kept as pets, but may be hunted as gamebirds.

The domestic goose is a domesticated version, or variant, of the Anatolian landrail. Geese are usually kept as pets; however, they may be hunted as game.

The domestic pigeon is a domesticated version or variant of the rock dove. Pigeons are usually kept as pets. However, they may be hunted for sport.

The domestic quail is a domesticated version (variant) of the bobwhite quail. Quails are usually kept as pets and eaten as food.

The domestic rabbit is a domesticated version/variant of the hares. Rabbits are usually kept as pets or used for hunting.

The domestic turkey is a domesticated version and variant of the Meleagris gallopavo. Turkeys are usually kept as pets but may be hunted as food.

The European starling is a domesticated version. Starlings are usually kept as pets though may be hunted as game birds.

The guinea pig is a domesticated version that originated in South America. Guinea pigs are usually kept as pets although they may be hunted as food animals.

The kookaburra is a domesticated version originating in Australia. Kookaburras are usually kept as pets whereas they may be hunted as prey.

The ostrich is a domesticated version originally from southern Africa. Ostrichs are usually kept as pets with some individuals being hunted as food.

The domestic dog is a domesticated version derived from wolves. Dogs are usually kept as pets as well as used for hunting.

 

Questions

Questions used across top search results:

• How can you tell a male from a female wild turkey?

A male has a redhead and neck, while a female has a grayish-brown head and neck. Males also have a black tail tip, while females do not.

What does a turkey call sound like?

A turkey gobbles when it wants to attract mates. A turkey will make this noise by opening its mouth wide and making a loud “gub” sound. This sound is made by forcing air through the nasal cavity.

How long does it take for a turkey to reach sexual maturity?

It takes about two years for a turkey to mature sexually.

How old is a wild turkey?

Wild turkeys live up to 20 years old.

Where did the name turkey come from?

Turkeys were first called turkies because they were thought to be related to the Turdus genus of thrushes. In 1580, the English word turke was used to refer to