Underfire Pinhead and Huck, why don't you spend thirty seconds looking in the Limitations section of your FCOM? There is no such limitation if your window heat is working.
This place has been over-run by simmers I fear.
Simmer? Lordy.
Actually I'm a 767F captain.
But I was an MD-11F captain when I hit a bird outside Quito at 330 kts. Terrain was around 10k msl so we were definitely in birdstrike territory above ten. Cost the company a radome and a bunch of other damage.
I've also hit a bird at 250 kts in a King Air, hit another at ~170 knots in a DC-10, and at 130 knots in a 767, last month, in the flare at Changi.
With a wide spectrum of data on this, I do 250 or less below ten. Always. Maybe above ten if the terrain is super high.