Just like last year, March is when the Marsh Wrens start singing. Of course, a lot of birds start singing in March, it's just that it's hard to find Marsh Wren's when they aren't singing as they spend much of their time down low among the reeds of marshy areas.
It was a pretty dreary day a couple of Sunday's ago, but that didn't deter a few wrens at Ridgefield National Wildlife Refuge from composing their song of chirps, buzzes and warbles.
Though these shots were taken just outside my car at Ridgefield National Wildlife Refuge's auto tour, this is a small bird. So I was lucky to have rented a 200 - 400mm zoom along with a 1.7x teleconverter. That's boosts the zoom at 400mm to 680mm. Multiply the 1.5x crop caused by the smaller sensor in my D90 and you have an equivalent 1020mm.
I really like the 200 - 400mm lens, but I prefer the 600mm Nikon offers. Both have a wide open f-stop of 4.0, but in order to get the reach of the 600mm, I have to use the 1.7x teleconverter. That increases the f-stop to over 6.0, slower than my current 70 - 300mm zoom. With all the cloudy days we have here in western Oregon, I really want something faster.
Anyway, for such a tough bird to photograph, I've had pretty good luck at RNWR. The car blind really does work out quite well.