4 ms·
According to http://www.sibleyguides.com/conservation/causes-of-bird-mortality/ http://www.sibleyguides.com/conservation/causes-of-bird-mort... the biggest thre
by vixen99 8y ago
According to http://www.sibleyguides.com/conservation/causes-of-bird-mortality/ http://www.sibleyguides.com/conservation/causes-of-bird-mort...
the biggest threat by far is windows.