Question

From the last four decades (1980-90, 1990-2000, 2000- 2010, 2010 – 2020) collect the data about life span of different birds such as parrot, eagle, owl, sparrow and humming birds.

Answer 1

Answer:    Backyard birders often get attached to their feathered visitors, believing the same birds are returning year after year. While the same species may indeed keep visiting the same yard for many years because it meets their needs, are they really the same individual birds? While there are occasionally unique characteristics that allow individual identifications such as a deformed bill, amputated foot, or leucistic plumage, many birds look alike, and understanding bird lifespans can help birders realize just what birds may or may not be returning to their yards.

how long bird live

Many factors affect how many years a wild bird may live. In general, larger species such as raptors, albatrosses, and large parrots have longer lifespans, and each bird species may have different life expectancies. Other factors that impact bird mortality include:

• Diseases, both individually and epidemics spread among flocks or colonies
• Injuries that can impact breeding success or cause fatalities
• Predators, including the presence of invasive predators
• Availability of resources, including food, breeding sites, and suitable habitat
• Conservation measures, such as captive bird breeding or habitat preservation
• Environmental and artificial threats, such as climate change, oil spills, natural disasters, etc.
• Individual experience, with more experienced birds better able to survive changing conditions                                                                          Bird mortality is generally highest in the first year after hatching, and ornithologists estimate that 80-90 percent of baby birds do not live to maturity. Consider that one mated pair of birds may raise multiple broods that could add up to 15-20 or more new birds each year; if mortality was not dramatically high, bird overpopulation would be a serious issue. Because of the high mortality and different factors that affect bird lifespans, however, overall populations can stay relatively balanced.