ORIGINAL: AH1G
I think it is more probable at this time of year, that you appeared to be a threat to the birds mating territory more than food. I've flown with hawks, eagles, falcons and other birds of prey for years (read that decades) without incident, they are great indicators of lift. I currently fly in bald eagle and redtail territory and have both BE and redtail nests on my property. Would the color scheme of your sailplane be anywhere close to a birds coloring?
Did not do great in ornithology at college...but for most animals and even fish for that matter,,dark equals food, bright equals enemy and or mating/territory....this time of year here, food is just starting to become more available in the wild, which in turn, sets the onset of mating........of course it could just as well be..."dang yellow 4 stars, hey guys lets go bust that thing in half"!!!!!!!!!Wierd thing here, a guinea hen has taken up residence, (not my field..my house) lots of us feed it ( I am a critter feeder during the winter) but it is male and crows in the morning for short bursts...inside our city limits you can not have a rooster, but you can have chickens (there's 100k people in town here) so we are in a quandary as to it mating (she disappeared last year)..I feel for the poor bird...Rog