Category Archives: birds

Osprey struggling to get off the water

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Beautiful slow-motion footage from the BBC shows an osprey trying to lift off with a heavy fish.  Unfortunately, the narration repeats an old myth that an osprey’s talons lock and can’t be released and therefore a strong and heavy fish can pull an osprey underwater and drown it.  Click here to view the video.

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What to do about this window dove nest?

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sam's-doveQuestion #1: This bird made a nest next to my kitchen window. What kind of bird is this?

Submitted by: Samantha, New York City, New York USA

Question #2: A pair of mourning doves have made their nest on the outside windowsill of my home office on the 6th floor of an apartment building. At least one and possibly two fledglings are in the nest and are already trying their wings. I don’t want to harm the birds, but I want to remove the nest as soon as possible because it has infused my office with a barnyard smell. I have read that these birds can raise multiple broods in a season. Is there a time window for me to remove the nest and install a block to prevent their return?

Submitted by: Ron, New York City, New York USA

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Move a bird nest?

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The Question: I have a mallard hen laying eggs (11 so far) in a flower pot on the end of my dock and I’m loving it. The problem is we are getting a new dock in a few weeks. If I move the pot 20-25 yards away to the neighbor’s dock will Mama duck be able to find the new spot? Mama isn’t here during the days so she’s still laying but has to be done soon. Would it be better to do when she is incubating so she goes with the eggs at the same time??

Submitted by: Lizanne, Nebraska, USA

The Question: I took down a hanging plant to water it and there was a nest with 3 eggs in it. I accidentally dropped it when I went to rehang it and the eggs broke. I moved the plant to my porch floor so Mama could find it. Will she lay more eggs?

Submitted by: Betsy, Illinois, USA

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Ducky questions

mallard drake flying
mallard drake flying

Because they are such common and charismatic birds now found nearly worldwide, and many people enjoy seeing them and adopting them, at least in spirit, I frequently get questions about mallards (Anas platyrhynchos). What follows is a small collection of mallard questions and answers.

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mallard duckling
mallard duckling

1. Can this mallard hen feed her young? There is a group of mallards in my back yard/pond. There is a female with a broken bill. It appears that she has a mate, but I worry. If she has eggs will she be able to feed her young?

Submitted by: Anne, Virginia, USA

Anne, I’m sorry to hear about the female mallard.  The good news is that mallard ducklings are able to feed themselves within 24 hours of hatching.  The only thing the mother duck does is lead them to places where they can find food. So my concern would be whether the mother can feed herself.  Does she seem to be doing that?

Anne’s response: “Yes, she can feed herself, the tip of her tongue sticks out to one side but otherwise she seems to be doing well.  I put cracked corn out every morning and I make sure that she has a little extra, which seems to be working, considering she looks like she has gotten a little bigger and is holding her own against the other ducks.”

Most wildlife managers strongly discourage the feeding of wild ducks, but it’s hard to argue with your compassionate impulse for this injured hen. I hope she continues to do well. And if she does nest in the spring, her ducklings should be fine.

mallard hen
mallard hen

2. How many females per male? What is the best ratio to keep mallards if you are wanting them to lay eggs for babies? In other words, how many females per male would you put together?

Submitted by: Steve, USA

Steve, thanks for your question.  Unfortunately, I’m not a duck expert, and I’ve never raised ducks.  My site is really interested in the behavior of wild ducks.  I would think that one male could probably take care of a lot of females, but you might want to check sites like this one: http://www.duckhobby.com/

mallard hen with turtles
mallard hen

3. How to protect a nest? Hi, I live on a lake and feed mallard ducks daily. Love ’em! There are three that return every day to be fed. I named them Peter, Paul and Mary. Mary built her current nest in the cover of several large plants directly under my front window. The only reason I knew she was there was because my dog “showed” me one day. I was devastated to come out of my home this morning and find several eggs broken and scattered all over my sidewalk and driveway. I was terrified that something happened to Mary too. Once I found her to be okay, my concern grew because my fear was that there was an animal that got to the nest. Sadly, the broken eggs revealed feathers and then my protective instinct kicked in. I know, and understand that this is how nature works, but I so want to protect Mary and what’s left of her nest. If it was another animal who got to the nest, now they know where they can find her again. Isn’t there something that can be done? According to your article, she leaves the nest once in the morning and once in the afternoon. Can I cover her and the nest at night so she is protected? What can I do?

Submitted by: Cookie, USA

Cookie, I’m sorry to hear about the trauma there.  Even when a predatory situation is perfectly natural, it can still be hard to witness, or to see the aftermath.  I try to remind myself that predators have babies to feed, too. But I wouldn’t blame you at all for trying to protect your friend Mary.  First, I have to ask, are you sure there are any eggs or ducklings left to save? I don’t know about mallards specifically, but female birds that are brooding will often continue to sit on the nest for a few days even after all the eggs have been stolen or destroyed.  Probably, the hormones that control the behavior take a little bit of time to subside.  So it’s possible that even if she’s still sitting, it’s too late to do anything to help.

The second thing I have to ask is, are you sure the predator wasn’t your own dog?  Dogs do like eggs, after all.  And as you said, your dog knew where the nest was.  Obviously, if there is any possibility that your dog is the predator, the simple answer is to keep your dog away from the nest.  But assuming it was not your dog, I don’t know that there’s much you could do.  Most of the typical duck nest predators – such as raccoons, coyotes, foxes – would be pretty hard to keep out in any way that didn’t imprison the hen.  If you tried to put a fence around the nest, it would have to be pretty high to keep a fox out, and raccoons can climb over almost anything.  I guess you could try a heavy covered wooden box, but that might just stress the hen to an extreme.

I’m afraid I don’t have a good solution.  The only good news I can offer is that nest predation is a common occurrence and when a nest has been destroyed, mallard hens usually start over, typically within a week. Hopefully, Mary will try again and she’ll have better luck.

mallard tipped up
mallard feeding

4. Are mallard drakes the worst creatures in the world? I was at a lake and was upset to see a female duck surrounded by 7-9 male ducks pecking her and nearly drowning her. She was so tired and was shaking in shock. My family told me not to be silly, it was just nature. But I am worried that she didn’t survive. Why do the males make such horrible attacks?

Submitted by: Karen, UK

Karen, I sympathize with your distress. It is pretty traumatic to watch, to be sure.  I wrote about why this happens in ducks at http://askanaturalist.com/why-are-these-mallard-males-beating-up-this-female/.  I’m not really sure I have much to add to that explanation.

However, it is important to remember that some of what we see is “unnatural” behavior that occurs in parks that have an overabundance of mallards. And I read an article recently about a study of the “divorce rate” in birds.  This is the rate at which mated pairs separate and pair up with new mates.  http://wuky.org/post/introducing-divorce-rate-birds-and-guess-which-bird-never-ever-divorces. Here’s a quote from that article: “Ducks do better than humans. Human marriages (American ones) fail at a rate of roughly 40 percent … Mallard marriages are 91 percent successful.”

So oddly enough, mallard matings in the wild are more stable than those of people.  Not sure how much consolation that is, but that’s all I’ve got.

mallard pair
mallard pair

5. Are mallard drakes the most loyal widowers in the world? A mallard drake has remained by his dead mate for the last five days. Initially I thought I would bury her when he left … perhaps I should just do it? She is beside my pond and attracting flies.

Submitted by: Sarah, UK

Sarah, awww, that’s sad … and a different side of the “horrible rapist mallard drake” picture.  I don’t really know how long the drake will stay there.  But probably not much longer, and the sooner the female is gone, the sooner he’ll move on.  I think burying it would be a nice thing to do.

Sources:

Black, J.M., 1996, Partnership in Birds, the Study of Monogamy, Oxford University Press, Oxford.

Drilling, N., Titman, R., and McKinney, F., The Birds of North America Online, CORNELL LAB OF ORNITHOLOGY and the AMERICAN ORNITHOLOGISTS’ UNION,http://bna.birds.cornell.edu/bna/species/658/articles/breeding

Cite this article as: Pelletier, TC. (December 23, 2014). Ducky questions Retrieved from http://askanaturalist.com/ducky-questions/ on February 19, 2017.

What is chasing these birds?

Mourning Dove
mourning dove

The Question: It’s VERY hot and humid here in Milwaukee – the cicadas and other insects seem to be the only ones enjoying it. Last night while walking my dog about dusk, I saw two different mourning doves being “chased” by something about 1.5 inches (4 cm) or so. The bird was flying quickly – in one case it had tried to land in a maple tree and then seems to have been sent off as this shape followed it. Could the tormenter be a cicada?

Submitted by: Lezlie, Wisconsin, USA

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cicada killer
cicada killer

The Short Answer: Lezlie, it doesn’t seem very likely to me that it would be a cicada. I would rather expect the bird to be chasing the cicada than the other way around. But in trying to think of a 1.5 inch flying creature that a bird might wish to avoid and that might also be associated with a noisy population of cicadas, I first wondered whether it could it be a cicada killer, of which there are several species in the U.S. These large wasps (as large as 5 cm, 2 in) specialize in preying on cicadas. The female cicada killer stings a cicada to paralyze it and then stuffs the cicada down a hole dug in the ground. The cicada killer lays an egg on the cicada and when the egg hatches, the larva consumers the cicada. Female cicada killers tend to dig their holes in the same area, so in sandy, dry soil, you can sometimes see dozens or hundreds of these holes, especially when cicadas have a big year. During the summer, the males, which cannot sting, form “leks.” A lek is when males congregate to struggle for dominance and females arrive to mate – usually with the winners.

Chuck Holliday, an emeritus professor of biology at Lafayette College in Pennsylvania, has studied cicada killers extensively. He says that when they are on a lek, male cicada killers will chase anything that in any possible way could be a female cicada killer. Pretty much anything that moves.

“They will chase small birds, people and even small stones thrown in front of them. After all, for them, it’s ‘mate in the next 1-2 weeks or die childless.'”

European hornet
European hornet

My first thought was that maybe it was male cicada killers that chased the doves. But Professor Holliday pointed out that cicada killers in Wisconsin (which would be Sphecius speciosus) would be done mating around the middle of August. So since you made your observations in September, that pretty much rules out cicada killers. He suggested that chaser would be more likely to be European hornets (Vespa crabro), another large wasp (up to 2.4 cm for workers, 3.5 for queens). They look a bit like oversized yellow jackets. European hornets build nests in tree holes, and will sting to defend the nest. If a bird were to inadvertently fly near a European hornet nest, it will probably get chased. There have been reports of European hornets killing small birds such as hummingbirds. And Dr. Holliday suggests a hornet might even be hoping to take a bite out of a dove. “Hornets (including yellow jackets) will land on carcasses and even people and bite out a chunk of skin to take back to the grubs in their nests to feed them.”

So it seems more likely that it was a European hornet than a cicada or a cicada killer, and the connection with cicadas may be nothing more than that cicadas and European hornets are both associated with trees. But if you see it again, look to see if it’s a large hornet. If it’s a cicada killer, from a distance it will look mostly black with some red, whereas the European hornet will show yellow, like a large bee or yellow jacket.

Cite this article as: Pelletier, TC. (September 19, 2014). What is chasing these birds? Retrieved from http://askanaturalist.com/what-is-chasing-these-birds/ on February 19, 2017.