Bird House against predator

Hi I was tired to see the magpies and flickers destroying the nest and kill the sparrows After days of research i came up with this model that i tested last summer and believe me, it was successfully accepted by sparrows This year i made bunch of them, some different models till i get to the yellow one style that is perfect I really loved it and i'm here sharing it with you guys I will share plan for this bird house in my Instagram next week (June 12)