bird call--please help me to identify?

there is this bird, at least i think that it is a bird, who only comes around every so often. it's call sounds like "ying-ying." it is metallic sounding and drawn out over maybe a second or a second and a half. it reminds me of when you hit a hollow metal flagpole and can hear the echo go up and come back down. if you can't help, can you at least point me somewhere? by the way, I am in northeast Ohio, about 40 miles south of Cleveland. A bunch of crows were making a whole lot of noise, too, before i heard the sound today, if that helps with identification. Thanks :)