The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.

To predict the lifespan of a Ruby-Throated Hummingbird based on its heart rate, we need to consider several factors beyond just heart rate alone. Lifespan is influenced by various factors such as genetic predisposition, environmental conditions, predation, and availability of resources.

However, to provide a general explanation, we can consider the relationship between heart rate and metabolic rate in birds. Birds with higher metabolic rates tend to have higher heart rates. Higher metabolic rates generally result in shorter lifespans as they often entail faster aging and increased energy demands on the body.

The Ruby-Throated Hummingbird's resting heart rate of 250 beats per minute is relatively high compared to other bird species. This suggests that its metabolic rate is also relatively high. Additionally, its heart rate can reach 1200 beats per minute when threatened or chased, indicating a significant increase in metabolic demands during such situations.

Considering this information, we can hypothesize that the Ruby-Throated Hummingbird likely has a shorter lifespan compared to other bird species with lower heart rates. However, without specific data on their actual lifespan, it is challenging to make an accurate prediction.

To further investigate and justify this prediction, you would need to research scientific studies or observe Ruby-Throated Hummingbirds in the wild, collecting data on their lifespan, environmental conditions, predation rates, and reproductive success. Such studies would provide more accurate insights into the factors influencing their lifespan.