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The Nature of Owl Talk Photo by Kurt Lindsay Kurt Photo by www.hungryowl.org NEWSLETTER“For owls and our shared environment” Issue No. 2 - 2016 The Nature of Owl Talk By Joe Mueller Biology Professor, College of Marin The sounds of owls talking late into the night may seem mysterious, but there are solid biologically accepted reasons for their diversity of vocalizations. The variation has much to do with how owls have evolved, becoming the dominant nocturnal avian predators. Owl behavioral ecology explains why owls have evolved such a plentiful repertoire of hoots, howls, wails, screams, whistles, yelps, shrieks, barks, whines and whinnies. Although there’s no single accepted definition, bioacousticians often distinguish bird vocalizations by categorizing them into two groups: songs and calls. Songs are typically the loud and relatively long vocal displays that males Owl eyelids blink from top to bottom, unlike other birds, but just like us. Perhaps that's make to defend territory and attract mates. why we think they're wise... Photo by Joe Mueller Calls are short simple vocalizations, usually made by males and females alike early November, male great horned owls Later in the season, circa January to to give warnings and register distress, as fly from post to treetop, hooting the March in our region, the male owl’s low well as to signal arrivals at the nest to feed. circumference of their domain. This pitch hooting functions for attracting a behavior functions as a “keep out” mate. Their mating behavior is a lot more The range of owl vocalizations, from warning to prospective male rivals, as complicated than it appears just from the hoots to howls, serves a variety of each male marks his territory, his food sound of it because many birds, including essential functions. Primary songs, for source and his mate’s nesting area. The owls, work hard to keep their species instance, are all about territory and male great horned owl not only announces genetically separate. Because of their mating; in other words, owls sing to assure his territory, but also broadcasts his fitness behavior mechanisms, a great horned owl enough food and reproduce. Since owls to warn aspiring competitors to stay away. would never breed with a spotted owl, for are among the earliest nesters, the first Male owls have no need to fight because example. In other words, the great horned order of business for the males is to they proclaim their power with the female would never choose to mate with proclaim their territory. As the sun sets in intensity and consistency of their vocals. an owl that is hooting like a spotted owl. ...continued on Page 6 HOP is a partnership with 501(c)(3) Non Prot ID No. 51-0172331 1 Ambassador Owl To Choose Update Hope Gazeau the Great Horned Owl Dear Friends of the Owls, It is hard to swim through the endless sad and haunting information we are confronted with and not feel despair. Feeling apathy is understandable, and we’ve all felt that way before. Yet, what if by choosing hope, it magically makes a difference in the outcome? If 2016 has been our chance to introduce Gazeau to the outcome is inevitable, what does it matter how we choose to the world. We started carefully, with smaller, very feel? However, with hope comes a responsibility to try to make manageable presentations to friends of Hungry those positive changes. It gives us meaning and courage. With hope Owl, but she’s now been to two libraries, an Earth we can look out upon the world, and see the exquisite beauty that Day celebration, and a presentation to Girl Scouts reflects in all that surrounds us. That is truly worth preserving and at Camp Bothin. We’re especially looking forward to introducing her to many of you at protecting. Talons in October. (Gazeau was named after one of our mentors, Camille Gazeau, who passed Every footstep makes an impact. Every good thought or deed away 3 years ago. “Gazeau” rhymes with “hello”. makes an impact. No matter how insignificant it might seem, we When you think of her, think “Hel-LO Ga-ZOH!” make an impact each day, good or bad. By choosing hope in each Just say it quietly if she’s near.) Photo by Joe Fox moment, our impact can add to the light. One candle, lighting others, can bring light to the darkness. Buho the Western Screech Owl Hope can mean the one owlet rescued and reunited with her parents survives to rule the night skies. Sincerely, 2016 has been a very full year for Buho. Hundreds of people have had a chance to meet Alex Godbe him and learn about our local owls at HOP Executive Director presentations. Buho may be small, but he makes a remarkable impression! (“Buho” is Spanish for “owl” and pronounced BOO-oh.) Photo by Joe Fox HOP Newsletter - Issue No. 2, 2016 The Hungry Owl Project 50 Glen Rd, Novato, CA 94945 The Hungry Owl Project Newsletter is published 415-454-4587 NEWSLETTER semi-quarterly. Subscribe by becoming a HOP member [email protected] at www.hungryowl.org or by calling 415-454-4587. www.hungryowl.org We make every effort to ensure that all contents of this publication are accurate. Nonetheless, human error, Executive Director: Alex Godbe printing errors and other mistakes still occasionally occur. Editor / Assistant Director: Joe Fox Printed locally in the SF Bay Area on recycled paper. © 2016 Hungry Owl Project 2 www.hungryowl.org Sunday, October 2nd Noon-4pm Live Owls & Hawks Adults: $35 / Kids: $10 Educational Talks At: Marin Art & Garden Center Kids Corner 30 Sir Francis Drake Blvd, Ross, CA The Hungry Owl Project 50 Glen Rd, Novato, CA 94945 Food, Wine & More Tickets & Info: www.hungryowl.org 415-454-4587 [email protected] www.hungryowl.org Executive Director: Alex Godbe Editor / Assistant Director: Joe Fox © 2016 Hungry Owl Project TALONS is presented by HOP in collaboration with the Marin Art & Garden Center • HOP is a partnership with WildCare - www.wildcarebayarea.org www.hungryowl.org 3 We climbed the ladders until we were An Interview With James Reed, just under the maintenance platform, where we were blocked by loads of Tree Climber & Raptor Rescuer sticks. This was very interesting to me By Joe Fox & Alex Godbe that the birds instinctively new that the ladder was a possible route for predators they need simple steps to follow to precautions in doing the tree work to and they built a barricade to prevent handle these situations and still benefit their survival. Not to mention anyone from reaching the nest! I spent complete the work. Another way is to our own safety as well. Infrequently we about five minutes breaking up and contact the Western Chapter will find raccoons nesting the trees and tossing sticks down below to ascend the International Society of Arboriculture its just best to leave them alone last five feet to the nest. When I finally here in California. They would be able completely, or risk getting attacked. reached the nest we were about 100ft up to send out information through their from the ground and the wind was network and would help to emphasize HOP: How did you connect with HOP blowing about 20mph. I immediately the importance of protecting wildlife as and start volunteering with the rescue saw the young bird trying to fly from the part of our industry standards. program? nest, opening its wings it would start to soar but was tethered by a 4 ft piece of HOP: Do you find it helpful to know a JR: My friend and fellow arborist, Jim twine. Apparently the parents had little natural history of the common Cairnes, who has been one of the woven into the nest a long piece of twine species you’re likely to encounter while original tree climbers for HOP, into the nest to hold it together but working in trees? For instance, by introduced me to the program and sometime after the baby hatched the contacting HOP, we are able to identify trained me on handling raptors in the twine wrapped around its leg and tied it the species and estimate a safe time for trees. to the nest! With the other two men the work to be completed. People don’t coming up behind me we had enough realize that it’s often simply a matter of HOP: Do you feel the work of reuniting hands and immediately captured the James Reed in a tree alongside a nest. postponing work for a couple weeks birds is important? osprey and cut the string loose from the Photo by Anne Ardillo while the birds complete their nesting nest. When we went to unwrap the twine cycle and the young leave the nest. JR: Yes, I think it’s very important, from its leg we ran into a problem and found the the skin had actually started to especially in the heavily populated all the environmental hazards for which was built on the top of an old grow around the string. At that point we James “JR” Reed is a Fairfax based JR: Yes. For me, since I now know areas. There is so much human activity wildlife. Raptors keep nature in check WWII crane - and that I should be decided quickly that we were not arborist and the founder of the Tree more about Hawks and Owls and in and around cities and the landscape is and we need to ensure their survival if prepared to climb using ropes and qualified to do field surgery and boxed Monkey Project (treemonkeyfun.com), a understand the time periods of their always changing - being torn down and we want any semblance of balance - saddle to ascend the crane.
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