Date: 5/7/18 1:57 pm From: Mary Alice H <mholz0226...> Subject: [birders] Nest parasitization or ?.
Hi, all, I have a question for all the experts on this list. Two or three weeks ago, I observed a robin busily constructing a nest in the arbor vitae by our front door. A few days later I found a robins egg, undamaged, on the front porch. A couple days later, no parent on the nest, I peeked in and discovered one robin egg in the nest along with 5 darker speckled eggs which I assumed (wrongly, it seems) to be cowbird eggs. Cowbird are around and I thought I glimpsed one coming into the tree once.
Actually, it is a grackle! I'm over run with them this year. Do grackles take over robin nests? If not, what happened? If the robin egg hatches, what then?