Goofy Weather Goofy Animals
This year the El Niño weather in New York State has made this the most unusual winter than I can ever remember. It almost feels like a roller coaster with temperatures last week above average, this week average and then soon to be above average again next week. I have never experienced anything like this before and have started to wonder what effects this could have on our local animals?
You wouldn’t think that warm temperatures in January could affect our local butterfly communities this summer. Take a caterpillar that hatches from an egg in the early spring and takes advantage of the spring wildflowers, tree buds or even early leaf development. After constant warm temperatures in January the caterpillars could emerge extra early and now starve from not finding enough food. Numbers for that population could drop drastically overnight and take it numerous years before the population returns back to normal. Looking one step further, this could affect the migrant birds searching for food on their journey north, etc….
The Little Brown Bat (Myotis lucifugus) will winter in underground caves, sometimes hundreds of miles away from their nursery colonies. These nursery colonies are typically in buildings, hollow trees or even in bat boxes (which we have placed here in Allegany). While hibernating they will wake up every few weeks and fly around when warm near their wintering cave. So, how is this weather affecting Little Brown Bats?? Last Thursday I was asked to move this Little Brown who found itself in an unwanted location. We rarely find them in this area of the park until March at the earliest and I never expected to find this species here in January. They should be further south in Pennsylvania, but with warmer temperatures this year; they are able to survive closer to their nursery locations than they could in previous years. This could benefit the bats if temperatures stay good but if we get a cold spell it might make it harder for them to survive?? At this point it is hard to tell!
Photo by flickr friend annkelliott so please be sure to visit her photostream! Thanks for permission to use this picture!
In the northern latitudes the Long-tailed Weasel will go through a color change from its basic brown with (whitish – yellow) on its belly to its alternate color phase of all white except a little black tip on its tail. Annkelliott told me this interesting fact when I emailed her for permission to use her picture. She said “I found it interesting to read that the reason the Long-tailed Weasel has a black tip on its tail is so that for example, a hawk, would see the dark tip and grab that instead of the body, allowing the Weasel to escape”. With that in mind, you have these bright white weasels running around with no snow on the ground!! Predators like hawks, owls or even the fox can now easily see this prey from a good distance and reduce its chances for survival.
Good or bad the El Niño year is part of the life cycle and animals have survived years like this before! While some species are benefiting from the warmer temperatures; some could have their cycle disrupted and lose their life. Currently we are under a snow advisory with 6 inches of snow expected tonight. I can’t believe that just last week the average low temperature was 33°F and the average high was 49.6°F.
Mon@rch's Nature Blog 