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About Roger Lederer
(Top Expert on this page)

Expertise
Any and all about wild birds - the science of ornithology. Information about birdwatching, ecology, conservation, migration, behavior, banding, rehabilitation, feeding, songs, binoculars, identification, and careers in ornithology. No questions about pet or caged birds, please.

Experience
Have a PhD and thirty eight years as a professional ornithologist - research, teaching, author, speaker, webmaster of Ornithology.com . Have written thirty scientific papers, two bird field guides, a textbook in ecology and two recent books entitled "Amazing Birds" and "Birds of New England". Have traveled to over 80 countries watching birds.

Education/Credentials
PhD

   

You are here:  Experts > Recreation/Outdoors > Birding/Wild Birds > Birding

SubjectDate AskedExpert

moving a nest7/7/2009Bluebird Bob Walshaw
  Q: We are removing a tree from our yard and discovered today that there is a bird nest in there with 3 ...
  A: If the nest has a lot of mud it could be a Robin's nest. Bluebirds nest in cavities. Once incubation ...
Mallard Duck7/7/2009Julia Booth
  Q: We raised a baby mallard to adolescent successfully. Before the duck left on her own...she quit ...
  A: So you raised the duckling from the point it hatched, until it was ready to fledge. So 8 weeks? And ...
injured mallard7/6/2009Julia Booth
  Q: I discovered a injured mallard who feeds daily under my bird feeder. She has a badly broken leg. I ...
  A: It would help to know where you lived. I can give you the wildlife rehab directory for the US ...
3 robins eggs7/5/2009Julia Booth
  Q: I discovered this robin's nest in my blue spruce tree one day. After a week or so I didn't see the ...
  A: Given the period of time that the eggs went unattended, I seriously doubt they are viable. Birds ...
Wild Baby Cardinal7/4/2009Roger Lederer
  Q: How do I take care of this bird? It may have fallen out of the tree onto my lawn.? I don't see any ...
  A: It appears that the young bird JUMPED out of its nest, as they normally do when they are ready even ...
Baby Mockingbirds7/3/2009Julia Booth
  Q: For the first time, we have what I'm pretty sure are Northern Mockingbirds in our yard (we are in ...
  A: Yes, unfortunately that is normal. Mockingbirds are perhaps one of the nosiest urban birds, and that ...
Woodpecker species...7/3/2009Julia Booth
  Q: Hoping you may be able to help me out... My name is Dustin & I live in St.Catharines, ON. Canada. I ...
  A: Just based on the patch you're describing -which is called an occipital patch, I'm thinking it's has ...
Broken leg??7/3/2009Roger Lederer
  Q: I read your attached article and thanks for the help, however, is it possible to tape or mend the ...
  A: Well, you can't be sure if it is a broken leg. Sometimes a young bird doesn't get the right ...
Mourning Dove vomiting/worms in poop before dying7/2/2009Roger Lederer
  Q: Outside my grandmothers house there was a bird[which I think is a Mourning Dove] it was just staying ...
  A: The green color is not unusual as Mourning Doves eat vegetation and seeds. I can't tell you what the ...
house wrens7/1/2009Bluebird Bob Walshaw
  Q: I have house wrens in a small bird house directly on the back wall of our house.They are mere feet ...
  A: I am not sure what birds that you have there so far away. The bad House Wrens here use sticks only, ...
broken eggs in nest6/30/2009Bluebird Bob Walshaw
  Q: bird house fell and busted eggs. should i clean nest out or just leave it?
  A: Always clean a nest out immediately after the young leave (they never go back) and after any trauma ...
house wrens6/30/2009Bluebird Bob Walshaw
  Q: I have house wrens in a small bird house directly on the back wall of our house.They are mere feet ...
  A: Do nothing. And they eat insects at this time of year, and will eat suet if they stay there in the ...
One dead robin6/30/2009Roger Lederer
  Q: I live in New Brunswick and have a family of robins nesting in my vines that are attached to the ...
  A: Short answer - no,you should not have returned it to the nest. Young birds jump from the nest before ...
Barn Swallows6/29/2009Roger Lederer
  Q: I have a pair of barn swallows nesting under the eve on my front porch. When the temps rise in ...
  A: It is ok to mist the nest once in awhile. Just be sure not to disturb them any more than is ...
baby robins abandoned6/29/2009Roger Lederer
  Q: i appreciate your time to answer my question. we have a robins nest that is built on a out door ...
  A: If you are ABSOLUTELY sure that the nest is abandoned and there are live young inside, call your ...
house wrens6/28/2009Roger Lederer
  Q: , I have a question about what I believe to be "House Wrens." I put a bird house on the back wall of ...
  A: Sorry I didn't address all your questions. So let me try to answer what I missed Most birds like a ...
baby bluebirds dying one by one6/27/2009Bluebird Bob Walshaw
  Q: In the past we have had a wooden nesting box for bluebirds. Last 3 years we have had a PBC nesting ...
  A: This is a difficult one. Apparently the first eggs were not fertile. One parent should be able to ...
Odd behavior6/27/2009Roger Lederer
  Q: We have been having a pair of Purple Finches come to our feeder several times a day for the last few ...
  A: Actually, this is very common behavior. What the second female really is is a young bird begging ...
baby blue birds may be abandoned6/25/2009Bluebird Bob Walshaw
  Q: We have several 3 days old baby blue birds in a nesting box on our deck. The adults usually visit ...
  A: If they don't show up something has happened to them at this time of year. Early in the year if food ...
baby blue birds may be abandoned6/24/2009Bluebird Bob Walshaw
  Q: We have several 3 days old baby blue birds in a nesting box on our deck. The adults usually visit ...
  A: This is a difficult situation, but not unusual. Bluebirds have many predators and a hawk or ...
humming birds6/24/2009Bluebird Bob Walshaw
  Q: Is it bad to feed that red sugar water to hummingbirds?Thanks,Tom
  A: There is really no need to do that today. The modern feeders are red or orange and the Hummingbirds ...
wrens fledglings6/23/2009Bluebird Bob Walshaw
  Q: I had a mother wren and 3 fledglings nesting in a bird house. Yesterday the babies left the nest and ...
  A: Usually Wrens, Bluebirds and many other birds take their young to a more secluded area for as much ...
baby wrens6/23/2009Bluebird Bob Walshaw
  Q: We have a birdhouse that had that we found out today had 6 baby wrens. They were all outside on the ...
  A: Usually in a situation like this there has been an attack by the killer house sparrows. If the ...
bluebird coloring6/23/2009Bluebird Bob Walshaw
  Q: A male Eastern Bluebird has been nesting nearby since early this year. About six weeks ago I ...
  A: Bird colors often vary and they change as the year progresses and their feathers wear. I would doubt ...
Cardinal babies are gone6/22/2009Bluebird Bob Walshaw
  Q: I am wondering if you might be able to answer my question regarding a Cardinal nest that has lost ...
  A: This is not unusual and when both eggs and babies are gone and the nest is undisturbed it is usually ...
Baby bluebirds6/22/2009Bluebird Bob Walshaw
  Q: Today there were three live baby birds just starting to feather under our maple tree on the ground. ...
  A: Yes they do nest in tree cavities too. It sounds as if you did kill baby Bluebirds. Something, a ...
Baby Wild Dove6/20/2009Roger Lederer
  Q: My son found a young baby dove the other day. The little bird has a bad leg. It does have most of ...
  A: The BEST thing to do is contact your local wildlife/bird rehab center or wildlife official or vet ...
Robbin chickes taken away by ravins6/18/2009Roger Lederer
  Q: For the second year in a row robbins have nested in our yard in the country. Last night we watched ...
  A: This is perfectly normal. Crows, Ravens,Jays,Magpies and even Wrens feed on the chicks or eggs of ...
birds in trees6/17/2009Roger Lederer
  Q: We live in a small community and have a large tree in front of our house. Around dusk the birds ...
  A: You will need to contact your local wildlife official for help and advice. It is illegal to harass ...
dead and missing baby birds6/17/2009Roger Lederer
  Q: We live in the country in Ontario and have a large deck surrounding the back of our house. Each year ...
  A: Birds will not abandon their nests or eggs because someone got to close or even touched them. Birds ...
finches6/17/2009Roger Lederer
  Q: We have a nest of finches just below our rolled awning on our deck. On May 24 we found 3 dead baby ...
  A: It is typical for baby birds to jump out of their nest, sometimes quite a distance. If they survive ...
goldfinch and bluebird6/17/2009Roger Lederer
  Q: how smart can a goldfinch be? we have very large windows and i believe they come to the window in ...
  A: I can't tell you exactly what is going on with the goldfinches, but birds often do look at and react ...
Foster/Rescue needed for 5 ducklings in Burbank CA area6/16/2009Roger Lederer
  Q: I have 5 baby ducklings I rescued from a busy intersection in Burbank last week. They were only a ...
  A: Try one of these: California, Southwest region, Los Angeles County (Los Angeles)..... ...
nyjer seeds6/16/2009Roger Lederer
  Q: I have heard from a couple of different sources, two separate explanations on nyjer seeds. My bird ...
  A: All seeds have shells or coverings of one sort or another. Nyjer seeds are actually a small version ...
birds of prey identity6/16/2009Roger Lederer
  Q: We have many bird visitors. We are basically familiar with most of them,but needless to say not all. ...
  A: You don't tell me where you live, which is necessary for me to confirm the identification, but these ...
identification help6/16/2009Roger Lederer
  Q: My name is Joy. We live in the National forest of central Florida. We have numerous bird feeders ...
  A: This is the Great Crested Flycatcher, I'm sure. They feed almost exclusively on insects and so you ...
peacocks6/15/2009Roger Lederer
  Q: I was told that if you cover the eye in the feathers you can control Peacocks from mating.If this is ...
  A: I don't know who told you covering the eye in the feathers of the peacock can stop mating, but it is ...
Baby Birds6/15/2009Bluebird Bob Walshaw
  Q: for the last two years some small birds have built nests in artifical plants I have on my deck. ...
  A: If your two or three weeks is correct they may have fledged (left the nest on their own). Chickadees ...
Sparrows6/15/2009Roger Lederer
  Q: I read an answer you gave about releasing a small sparrow the sooner the better, why can she not ...
  A: First, it is illegal. Federal and state laws protect all wild birds against harassment, collecting ...
baby Cardinals6/15/2009Roger Lederer
  Q: My children rescued three baby cardinals from two cats. we had no idea where to even begin looking ...
  A: The bird should be flying by now. The best thing to do is ignore him. Baby Cardinals will beg for ...

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Questions by
Active Experts:
Julia BoothRoger LedererBluebird Bob Walshaw
Miguel Rodriguez  

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