Strange Noise

I was just falling asleep when there was the strangest noise outside my window. The best way I can describe it is like a yipyip kind of sound. I grabbed my glasses and looked outside, but it is too dark to see anything really. I am sure it is an animal, and I figure it must be a bird with the speed it is receding now. But what bird would be making noises in the middle of the night? All I can think is that it is an escaped pet or something – maybe a love bird? I have never heard anything like it before. Right, had best get some sleep. Hopefully this emailed entry will work this time. I have deliberately avoided apostrophes as they broke it last time…