Well, I finally purchased a macro lens, more precisely a Canon Macro 100mm. I decided to go with better quality. Now I told the seller to mark the package as gift, so hopefully I shouldn't get import duties.
It works great, and I like a lot. I'll post a sample pic later. It was a little expensive, but worth the buy, and I ended up paying only $25 for the custom fees. I saved quite a lot of money compared to the price I get at local camera shops.
Here is a Downey using the same 1000mm mirror lens, the image quality is not the best using this lens but it sure does get you close to the subject.
BTW, this image and the Cardinal image is a Jpeg straight out of my camera with no PP or cropping. It's a very difficult lens to use with a very narrow DOF but it sure does tests your skills.
I shot the distance with my laser range finder and both images were taken at 50 ft, not bad for straight out of the camera, but than again, not the best either.
I know almost all of the names of those birds (but in french). I have a very wide variety of species visiting my bird feeder, including almost of the wood peckers we have in Quebec and blue jays, I even rescued an owl hatchling the was pushed out of it's nest by crows.
The 250mm lens is a telephoto zoom with variable aperture. I can get good close-ups because the bird feeder is very close to my kitchen window.