Since the 19th century, the rose-ringed parakeet has successfully colonised many other countries. It breeds further north than any other parrot species. It has established itself on a large scale in Germany, France, Belgium, the Netherlands, Italy, and the UK.
The analyses show that the risk of parakeet establishment may rise further as a result of decreasing frost days due to global warming, rising urbanization, and rising human populations. Because of the significant separate parakeet imports in Europe, researchers are capable of investigating the widely held hypothesis of climate matching and human activity at the species level.
In the wild, rose-ringed parakeets usually feed on buds, fruits, vegetables, nuts, berries, and seeds. Wild flocks also fly several miles to forage in farmlands and orchards, causing extensive damage. Feral parakeets will regularly visit gardens and other locations near human habitation, taking food from bird feeders.
In India, they feed on cereal grains, and during winter also on pigeon peas. In Egypt during the spring, they feed on mulberry and in summer they feed on dates and nest inside palm trees and eat from sunflower and corn fields.
In captivity, rose-ringed parakeets will take a large variety of food and can be fed on a number of fruits, vegetables, pellets, seeds, and even small amounts of cooked meat for protein. Oils, salts, chocolate, alcohol, and other preservatives should be avoided.
In northwestern India, Indian rose-ringed parakeets form pairs from September to December. They do not have life mates and often breed with another partner during the following breeding season. During this cold season, they select and defend nest sites, thus avoiding competition for sites with other birds. Feeding on winter pea crops provides the female with nutrients necessary for egg production. From April to June, they care for their young. Fledglings are ready to leave the nest before monsoon.
Seasonal changes in testicular activity, plasma luteinizing hormone (LH), estradiol (E2), testosterone (T), and 5 α-dihydrotestosterone (5 α-DHT) were related to pair bond formation, nest building, nest defense, and parental behavior in free living Indian rose-ringed parakeets in northwest India. The parakeets are able to reproduce in the winter because it allows them to avoid competing with other birds for nesting places, postpone having young during the monsoon season, and take use of the winter pea harvest, which provides the female with extra nutrients for egg formation.
No comments:
Post a Comment