The agency says its bird radars can pick up birds as far as 3.7 miles away and up to about 4,900 feet. They log direction, speed, distance, and a …
Read More at Source.
Read More at Source.
Read More at Source.
Read More at Source.
Read More at Source.
Read More at Source.
Read More at Source.
Read More at Source.
Read More at Source.
Read More at Source.
Read More at Source.