It could have been the nest of American Crows and they left the debris on the ground. I checked the Birds of North America online site (I can't link to it because it's a subscription site, but I hope it's OK to quote from it) - Great site, well worth joining. If you participated in the GBBC you get a free trial subscription. Apparently crows sometimes pull living twigs off trees to make their nests, and they line them with various materials including bark strips. From Birds of North America online site: "Nest Construction Both sexes build nest; no information on relative share of each sex. Although both sexes bring in nest-lining material, female does more of detailed fine-tuning of nest lining than does male (CC). Builds nest mostly between 07:00 and 11:00 (S. S. Dickey in Gross 1946); early in morning, as early as 8 min after sunrise (Reaume 1987b); likely throughout day (CC), as in Northwestern Crow (Verbeek and Butler 1999). New nest distinguishable from old one by presence of fresh, dead twigs on ground below; these twigs fall accidentally and are never retrieved (Reimann 1942). In Encino, CA, and Stillwater, OK, pulls and breaks off living twigs from trees as well as picking up twigs from ground (CC). Gathers materials from different directions around nest tree, not from nest tree itself (Reaume 1987b). Helpers in Florida (Kilham 1989), Cape Cod, MA (Chamberlain-Auger et al. 1990), and in Oklahoma (CC) participated in bringing material to the nest. With 2 adults and several helpers bringing sticks, the congestion around the nest resulted in birds having to wait for a chance to get to the nest; helpers usually left their sticks for the female to work in (Kilham 1989). Period between completion of nest and egg-laying in Florida 6Â16 d (Kilham 1989), but Emlen (1942) reported building right up to egg-laying in California. Time to complete first nests in California 13 d (range 11Â17, n = 6 nests [Emlen 1942]; 10Â14 d [CC]); 5 and 9 d in 2 nests with helpers in Florida (Kilham 1989), 10Â14 d in Oklahoma (CC). Second nests take less time to build: 9 d (Emlen 1942); 6Â8 d (Graber et al. 1987); 5Â10 d in California and Oklahoma (CC). Structure And Composition Matter Bottom and sides consist mainly of dead branches, 0.6Â3.5 cm diameter (Reimann 1942) and usually Claire

I'm new here, so this is actually a question rather than comment. Last year, a Robin built a nest in iron basket on my front porch. About 3 weeks ago a dove built there and laid her eggs. Yesterday, a large piece from a plastic shopping bag was on top of the nest. The eggs were still there, but one has rolled away from the nest. The dove/s didn't return all day. This morning a Robin was working on building on top of the plastic and eggs. I am wondering what could have happened. Did the dove abandon because the eggs weren't going to hatch or something else.

Hi Eric! It's so nice to have kids interested in birds. There are lots of kids projects you can become involved in that are fun. Maybe next year you could get your classmates involved in some. I noticed you posted that you have Nuthatches in your nestbox. There is a great website www.sialis.org that has information on cavity nesting birds. I will find some of the other websites that have bird watching activities for you.

Thanks birdguy. Since time was of the essence, I looked further online and was able to find a NY State Wildlife Rehabilitator and got her on the phone. I was only seeing one Robin adult on the ground, sitting in the corner of the garden below the pear tree. It had been sitting there for several minutes, which seemed odd. I had seen either this one or another hopping around, but for over an hour there was no adult getting INTO the tree and taking care of the one hungry chick I could see. She recommended that I go outside and walk near the adult that was sitting in the garden to see if it would fly to the nest or away. When I went out to test the situation, it hopped away and hid under another bush as I approached, and I could see that one of the wings had feathers askew. The rehabber thought that I should get a towel and try to bring both the wounded adult and the remaining chick(s) to her house where she rehabbed many birds, since nobody was getting into the tree to feed the chicks and the adult may also be in danger. I went into the house to get some boxes and towels (she recommended separate boxes for the chick and adult to reduce stress on the adult), came out and the adult was no longer in the area. Perhaps he/she was just mildly injured and could not make it into the tree, but could fly or hop away to a more secluded spot to recuperate and rest. At any rate, no adult Robin was in the picture, the chick had not eaten in some time, so I got up on a stool and took the nest down. As I suspected, there was only one chick in the nest. It was only partially covered in a soft downy fuzz and was mostly pink and grey. So, my suspicions that there had been some sort of battle for the nest and chicks the night before were correct. Two chicks were taken, and either the parents had decided to abandon ship or were injured beyond ability to care for the remaining chick. Perhaps that injured adult that was hanging around was hoping to get the strength to care for the chick, but was unable to do so. I feel that somehow I was meant to see the situation. I took the nest in a towel, covered the top (left space for air) and put it in the box gently, and hit the highway to get to the rehabber. I could hear the chick chirping occasionally, and from time to time it would lift its head with open mouth waiting to be fed. It was heartbreaking. At every red light I looked down to confirm that the chick was still breathing, which I could easily see through the gap in the towel. I got to the rehabbers house and she couldn't be nicer. She had many small chicks of all varieties in paper towel-lined baskets in bins, with heating pads underneath to keep them warm. She immediately gave the chick some fluids with minerals subcutaneously, and said that you have to wait a while for that to take effect before giving other foods or the chick would not digest the foods properly. I had to leave shortly due to some business, but I'm waiting to hear if the chick made it through the day. The rehabber said that some chicks will make it for a few days, but then will fail to thrive and not make it, so I think she was preparing me for a 50/50 chance. The rehabber told me that every spring and summer she gets many Robin chicks with deformed feet, and that she suspected lawn and garden chemicals since Robins eat mostly worms and other insects that may have consumed these chemicals as well. She said that veterinarians always dismiss her theory about the chemicals, but I don't! I resolve to stop using any lawn chemicals from this day forward (my garden areas are already chemical-free). I have learned a lot from this episode, I hope the chick makes it, and next time I hear such a screetching sound and a nest is reachable, I will not hesitate to help if I can help. I feel so bad for the little family that I photographed so happily the day before. I know it's nature's way and that not all chicks will make it, and that there are eternal rivalries for food and territory among and between species, but it's still sad this evening when I look out the kitchen window and don't see the nest, the attending adults, and the chicks. Perhaps I'll prune the branches of that pear tree to discourage other robins from using it, as this is clearly not a good territory for them to nest in with so many bluejays and starlings around. Thanks again birdguy.