joinned last night when there addmin was on line , my first post was binned from the off , i stated nothing but fact's on how the RSPB slot in a breeding group of 3 falcon's into a site ie 1 tercil & 2 hen's , they stay together in this sometime's tense threesome with the odd hen just being tolerated , 1 year later she has a mate provided by the breeding pair , if that is not the case , and the only offspring are young hen's, they are sometimes removed being replaced with young tercil's , but this only happen's rarely , as by rule of thumb the ratio is 2-1 from a breeding pair . 1year further down the road another hen is located in the same area from none related bird's , and that is a colony established , they do their home work well locating the site's were there is a good food supply namely pigeon's , the site's are on knowen corridor's that pigeon's use to to get home . this is fact as on two occaisions out of three that they did this in my area . ( THEY FAILED )