Signal Processing HELP (wavread, wavwrite, fft)

[Dante]

I am currently working on a project where I have about three hours of data, and I am breaking it up into sections when I read it and plot it.

Current code:
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N1=1; N2=44100;
[wave,fs]=wavread('insectuno.wav', [N1 N2]);
siz=wavread('insectuno.wav','size');
sound(wave,fs);
t=0:1/fs:(length(wave)-1)/fs;
plot(t,wave);
figure(1);
plot(t,wave);
title('Wave File');
ylabel('Amplitude');
xlabel('Length (in secs)');
n=length(wave)-1;
f=0:fs/n:fs;

wavefft=abs(fft(wave));

figure(2);
plot(f,wavefft);
xlabel('Frequency in Hz');
ylabel('Magnitude');
title('The Wave FFT');

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Now what I want to do is separate certain sections of my plots (where the peaks are) and save them as separate .wav files.

So basically in the end I will have removed the non-relevant noises from my data, and in the separate .wav files I will have the respected noise with it's respected insect (part of my project). I'm assuming that I have to create a loop, but I'm having trouble doing that.

Any suggestions will be much appreciated!