To Moray but not home

On 10th Yellow HA flew from Blairgowrie (10.30am) over Angus hills to Deeside and so to Rhynie and Huntly and so to Elgin area where he roosted. Today he went down to the Lossie estuary in the afternoon and still there at 7pm.  Why does he not hutty home – he’s dealying the breedings eason with Morven waiting since 2nd.