Bird Fact Friday – Antpittas

Adapted from pages 310-311 of Birds of Central America:

A table of different Antpittas. Illustrated by Dale Dyer.

The Black-Crowned Antpitta is a distinctive species with no close relatives in the region, specifically Cemtral and Sothern America. They are uncommon and local residents in south foothills (mainly 300 to 1200 m, locally near SL in east PA). These birds are large and robust with very short tail, long legs, and heavy gray bill. Identifiable by the bold black- and- white scaling on underparts. Note the white spots on wing coverts, and that the males have black throats. Pairs or solitary birds bound rapidly over forest floor pausing briefly to stand on fallen log or other low perch. They are generally reclusive but attends ant swarms where it forages boldly. Habitually flicks wings and tail. Song (1) a very long series of loud, sharp notes wi- i- i- i- ii- i- i- i . . . that gradually slow and drop in pitch. May continue for almost one minute. Also (2) an abrupt, low- pitched, guttural three- to ten- note rattle kuk kuk kuk . . . or wucwuc- wuc- wuc . . ..

Meanwhile, the Scaled Antpitta is found from Mexico to Southern America. It is an uncommon to rare and local resident in foothills and highlands (100 to 2850 m in north, 450 to 1650 m in south). Also home to the volcanic highlands of El Salvador (Santa Ana), and recently reported from Cerro Musún in central Matagalpa, Nicaragua. These birds are plump and short- tailed. Note the gray crown scaled with black and pale malar and lores. Underparts mostly cinnamon with variable, narrow, pale crescent dividing throat and breast. Rump and wings are rufous- brown. Juveniles are mostly dusky with fine whitish and buff streaking on crown, nape, mantle, and breast. Adults from north CA are less richly colored below. These birds hop rapidly over ground and are secretive, but may forage in open on muddy forest trails or in shaded clearings. May also attend ant swarms, but are usually solitary. They are also known to sing briefly at daybreak. Song (1) a series of low- pitched, resonant notes that start as a trill, rise in pitch and volume, then slow to form distinct, hollow, individual notes before stopping abruptly huhuhuhHUHUuhuhu hu hu hu. Compare with song of Black- headed Antthrush. Calls include (2) a low- pitched grunt or croak.

Birds of Central America
Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama
By Andrew C. Vallely and Dale Dyer

Birds of Central America is the first comprehensive field guide to the avifauna of the entire region, including Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama. Handy and compact, the book presents text and illustrations for nearly 1,200 resident and migrant species, and information on all rare vagrants. Two hundred sixty detailed plates on convenient facing-page spreads depict differing ages and sexes for each species, with a special focus on geographic variation. The guide also contains up-to-date range maps and concise notes on distribution, habitat, behavior, and voice. An introduction provides a brief overview of the region’s landscape, climate, and biogeography.

The culmination of more than a decade of research and field experience, Birds of Central Americais an indispensable resource for all those interested in the bird life of this part of the world.

  • Detailed information on the entire avifauna of Central America
  • 260 beautiful color plates
  • Range maps, text, and illustrations presented on convenient facing-page spreads
  • Up-to-date notes on distribution supported by an extensive bibliography
  • Special focus on geographic variation of bird species

Marilyn Roossinck: 101 viruses

Viruses are seldom considered beautiful, though visually, many are in fact stunning. While the sheer mention of them usually brings on vigilant hand-washing, some are actually beneficial to their hosts, and many are crucial to the health of our planet. Virus: An Illustrated Guide to 101 Incredible Microbes by Marilyn Roosinck offers an unprecedented look at 101 incredible microbes that infect all branches of life on Earth—from humans and other animals to insects, plants, fungi, and bacteria. Recently, Roosinck answered some questions about her gorgeously illustrated new book.

How did you come to study viruses?

MR: I started college at the Community College of Denver as an adult student (I was 22 years old), with a plan to go take two years of courses and then transfer to nursing school. I took a Microbiology course and when we studied bacterial viruses, I was totally smitten by how amazing viruses were, these very small and simple entities that could change everything! I ripped up my application to nursing school and instead transferred to the University of Colorado to pursue a degree in Biology. There were two biology departments at that time: Molecular, Cellular and Developmental Biology; and Environmental, Populational and Organismal Biology, so I did a double major and got a degree in both programs. As an undergraduate I did an independent study in a lab working on SV40, a model for many studies on mammalian viruses. I applied to the University of Colorado School of Medicine for graduate school, and I received my Ph.D. from that institution in 1986, doing a thesis on Hepatitis B virus.

Why 101 viruses?

MR: The original plan was to include 100 viruses, a nice round number and enough to allow a broad range of viruses, including those infecting all the major host groups, from bacteria to humans. Near press time the Zika virus outbreak in Brazil was attracting a lot of attention in the press, so we felt it was important to include Zika. We did not really want to remove one of the viruses that were already in the book, because these were chosen carefully, and each entry seemed important for the complete picture, so, borrowing from Hollywood, we decided 101 would also have a nice ring.

How did you choose the viruses described in the book?

MR: Making up the list of viruses to include in the book took a lot of thought. I wanted to cover every type of virus and every type of host. I also wanted to include some viruses that people would be very aware of, like influenza and Ebola. There are more human viruses in the book than those that infect any other host, because they are more thoroughly studied, and most of them are familiar to people. I also wanted to include viruses that were pathogens and those that were not. It may come as a surprise to many people that some viruses benefit their hosts, and several of these are included in the book too. I also got some help from colleagues. After making up the initial list I sent it out to a large number of virologists for comment, and I took these ideas into consideration too. Of course many people were sure that the virus they were studying was the most important virus and should be included, but I tried to ignore this as a basis for inclusion.

Do you have a favorite virus?

MR: It is hard to pick a favorite, there are so many viruses that have a fascinating natural history, or that can dramatically affect their hosts. One of my students in a Virus Ecology course that I teach at Penn State summed it up pretty well. I was introducing the topic of the how poliovirus became a serious problem in the 20th century due to changes in water treatment, and I said, “this is one of my favorite virus stories”. The student replied, “you say that about everything”.

What viruses do you work with in your own lab?

MR: I have spent about 30 years working on Cucumber mosaic virus, a serious crop pathogen that has the broadest host range of any known virus: it can infect 1200 different plant species! This means it has been very successful from an evolutionary point of view, so it is an excellent model for studying virus evolution. For the past decade I also have been studying viruses that infect fungi. My interest in these viruses began when we discovered a fungal virus in Yellowstone National Park that was beneficial to its host, allowing it to survive very high temperatures found in the geothermal areas of the park. This sparked an interest in viruses that help their hosts adapt to extreme environments, and we do a lot of work now on beneficial viruses in plants and fungi. We also are interested in the diversity of viruses, and we have done some studies looking for viruses in wild plants: there are a lot, and most of them are novel.

virus roossinck jacketMarilyn J. Roossinck is professor of virus ecology in the Department of Plant Pathology and Environmental Microbiology at Pennsylvania State University. She lives in Bellefonte, Pennsylvania. Roossinck is the author of Virus: An Illustrated Guide to 101 Incredible Microbes.