I live in Colorado, so while we don't have extremely harsh Winters, we do tend to freeze over for a few months of the year. I see a lot of folks talking about the types of fish they keep in more Southern climates, but there are a lot of us who have to deal with Winter freezes and do not have the option of bringing fish inside.
I've been discovering there are apparently quite a variety of fish native to North America which are quite interesting, and able to tolerate the Winter conditions. One of our recent discoveries is the Iowa Darter (http://en.wikipedia.org/wiki/Etheostoma_exile). We ordered some online for an aquarium, and while these guys are typically bottom-dwellers, they are a lot of fun to watch. They are fairly small fish, but apparently do not get eaten because of their speed. They will eat insect larvae they find in the plants, and pick up uneaten food from the bottom. I am curious about acquiring some for my pond next year and see how they fare.
I have also mentioned Rosy Reds here before. Typically sold in pets stores as feeder fish, these guys are native to streams and rivers. I've had some in the pond for the past three years, and while they seem to spawn frequently through the Summer, there have been no surviving babies. I am hoping as the iris roots grow down through the rocks, this will give the babies the cover they need to grow.
Dragonflies of course can't just be caught and caged around the pond, but you can certainly attract them to your habitat. I've found that tall grasses seems to catch their attention. I do my best to bring in the dragonflies, because we have bad problems with mosquitoes due to living in the middle of town (not a lot of open wind to drive them away).
And finally, leopard frogs... I'm hoping to get some tadpoles this Spring and had a small handful of frogs around the pond.
So what else have you found that can tolerate Northern Winters? I really enjoy having a variety of creatures around my pond and would love to have a handful of different breeds of smaller fish that can survive along with the koi.
I've been discovering there are apparently quite a variety of fish native to North America which are quite interesting, and able to tolerate the Winter conditions. One of our recent discoveries is the Iowa Darter (http://en.wikipedia.org/wiki/Etheostoma_exile). We ordered some online for an aquarium, and while these guys are typically bottom-dwellers, they are a lot of fun to watch. They are fairly small fish, but apparently do not get eaten because of their speed. They will eat insect larvae they find in the plants, and pick up uneaten food from the bottom. I am curious about acquiring some for my pond next year and see how they fare.
I have also mentioned Rosy Reds here before. Typically sold in pets stores as feeder fish, these guys are native to streams and rivers. I've had some in the pond for the past three years, and while they seem to spawn frequently through the Summer, there have been no surviving babies. I am hoping as the iris roots grow down through the rocks, this will give the babies the cover they need to grow.
Dragonflies of course can't just be caught and caged around the pond, but you can certainly attract them to your habitat. I've found that tall grasses seems to catch their attention. I do my best to bring in the dragonflies, because we have bad problems with mosquitoes due to living in the middle of town (not a lot of open wind to drive them away).
And finally, leopard frogs... I'm hoping to get some tadpoles this Spring and had a small handful of frogs around the pond.
So what else have you found that can tolerate Northern Winters? I really enjoy having a variety of creatures around my pond and would love to have a handful of different breeds of smaller fish that can survive along with the koi.