It's getting cold out there, no doubt about it now. Especially at night things are freezing up. Just before lunch today I went out to fill the bird feeders at work. I noticed that our small pond for the birds had frozen over. I cracked it open around the edges so birds could get a drink and I noticed that this wasn't just a paper thin layer. I took a chunk inside and measured 6 mm of ice. When it doesn't melt away during the day and then freezes more at night it will slowly get thicker and thicker.
About the Site:
Kirk Mona is the founder of Twin Cities Naturalist.
He is a professional naturalist and writer.