Monday, May 6, 2024

A Century of Change in Connecticut's Birds

John Hall Sage—an unknown name; unknown, long forgotten, even in his native Connecticut, and even though his contributions to the ornithology of his state were epic.  A founding member of the venerable American Ornithologists Union, its secretary for decades and even its president, he in an era in which quantitative was an alien term collected data—dates, locations, sexes, measurements, notes about the specimens he collected—hundreds of them, thousands even. 

And that is how I know him—from late at night, night after night and even into the early morning, in the bowels of the University of Connecticut’s collection room, amidst the overpowering scent of mothballs, alone with his catalogs, with his details about birds.  My fingers repeatedly brushed across his handwritten records, with hands holding the pages he had held, unfolding the notes he tucked among the pages, reading the records scrawled across the back of his daughter’s 1912 wedding invitation.  In this place of silent contemplation, he had become a friend of sorts, someone I knew, separated only by that troublesome quantity of time.  His catalogs spanned fifty years, and fifty years hence I learned from what he had learned as I prepared for my first season along his adored Connecticut River.  It was a place which it appeared had slipped into oblivion after his time, without any further long-term study of its inhabitants.  Likewise, his irreplaceable collection had been relegated to a basement where it sat ignored before being rescued just before I came to use it.  I have wondered if he considered whether anyone would again have the constitution to take up the quest he had begun. 

Now it is another fifty years hence as I prepare for my next season in that transcendent place, that singular landscape where, as it broods in the first breaths of an approaching day, time for a time suspends and its essence is returned to those whose tenure here far predate ours—those of bright voice, of exuberant constitution, of unparalleled loveliness.  When I began my studies, I somewhere wrote down that I would have to grow old to understand the sorts of questions that filled my head.  And, indeed, as old age and slipping vision envelops me, there does seem to be some inkling of an answer: much of what we think we know we don’t, what we see over the short term is illusion, the immutably integrated is not so but fluid.  The relationships, the interactions, all that we see, none of them remain the same.  As I also wrote to myself, the river I studied was rather an enigma, flowing continuously like time, taking what was new down its course, turning it from young to old, and then releasing it from material bonds.  From there, we cannot know what becomes of such things—once young, then old, and then free.

Sage in his collecting focused especially on the tidelands of the Connecticut River but he did not stop there.  He was as well intimately familiar with the birds dwelling within the limited tracts of forest present in Connecticut’s late nineteenth century landscape—the forest in all of its manifestations from early successional through mature.  He chronicled its birds, considered their distributions, their abundances, how these changed over the years of his observation and how what he saw fit into his friend C. Hart Merriam’s life zone concept.

So too, I realized that during my tenure I must do much the same.  By the beginning in the 1980s, I began to quantify using the techniques of the era how it was that the birds of the forest configured themselves.  I expanded my horizons by taking my forest studies to the other side of the planet before, by the beginning of the 2000s, I embarked on long-term investigations of forest birds throughout Connecticut, summer and winter, now fully a century since Sage’s initial work—work that encompassed tens of thousands of observations and tens of thousands of measurements.

A small subset of these measures examined a thirty-five-year span in an expansive managed forest in a region, corresponding roughly with the southern boundary of Merriam’s Canadian zone, with bird communities predicted to be particularly sensitive to the effects of climate change.  This work demonstrated that bird community changes indeed did show some relationships to Connecticut’s warming climate, but not always, and often trends were opposite to expectations.  Similarly, community change showed a fair number of connections with changing vegetation conditions—wildlife management 101—but not always and trends were often opposite to expectations. 

When using more sophisticated protocols over twenty years in Connecticut’s largely unmanaged, aging and more expansive Northeast Upland ecoregion, portions of which flirted with old growth conditions, these same sorts of patterns appeared, with changing climate and maturing forests appearing related to a good deal of bird community change, but again many of the changes were contrary to expectations.  Some of these contrary patterns might have been related to larger continental phenomena, but what I suspected most was that I was observing evolution in real time.  Species typically associated with successional landscapes were exploding into mature forests; those once associated with remote core forests were becoming lawn birds.  Species that at the beginning of my studies were absent were now the commonest birds in the forest.  Still others were inexplicably disappearing in conditions that should have favored them.  In short, nature appeared more complicated than we might wish it to be; it was a moving target.

Once some time back I took a private trip to Sage’s still stately home near the Connecticut River to seek out whatever of him might still remain there.  While sitting at that spot I said to him, just in case he might hear me, “John, you know, it’s just you and me.  I don’t know that anyone else would ever want to do this.  It’s too hard, the personal cost too great and I’m not sure that it matters much to anyone but us.  In any event, maybe in the not-too-distant future this is a conversation we can have together.  Until then, John, rest well.”

 

Sunday, November 15, 2020

THE RARE VERTEBRATES OF CONNECTICUT

 


The Rare Vertebrates of Connecticut, out of print for 40 years and not otherwise available on the internet, is now accessible via Bird Conservation Research, Inc.  Much has changed since this volume was released.  Species thought to be rare in the 1970s, like the Cooper's Hawk, Pine Warbler, Yellow-bellied Sapsucker and Red-bellied Woodpecker, have undergone explosive population growth and are now regular Connecticut residents.  Others, like the Ruffed Grouse and White-throated Sparrow, have declined and still others, like the Common Raven, had yet to colonize the state. 

Thinking concerning the meaning of terms like State rare and State endangered has, as a consequence, evolved  (see, for example, this).  An important conclusion to be drawn from the extent of population change observed over time is that wildlife communities are dynamic rather than static assemblages (see this).  This conclusion affects how conservation concern is evaluated and requires us to develop a more sophisticated notion of how we view rarity at the local level. See this page and click on the PowerPoint presentation Global vs. Local Perspective on Endangerment for a more-in-depth analysis of this issue.   

The Rare Vertebrates of Connecticut provides us with a useful perspective on some of the earliest thinking concerning conservation of rare species at the local level.  It is available here.

 


Saturday, February 22, 2020

INVITATION FOR AUTHORS




Arts and Academic Publishing LLC invites authors to submit their book manuscripts for publication.  Authors do not need to submit through an agent, they incur no publication expenses and they receive royalties for books sold.  A complete compilation of author instructions may be found here.  We seek peer reviewed and copy edited manuscripts that are ready for layout and publication, although we offer review and editing services for those who need them.  Our fields of interest are scholarly works in any discipline and substantive literary works.

In writing (and speaking, for that matter), use precise, concise, original language.  Do not use jargon in place of plain language.  Avoid  such common grammatical weaknesses as misuse of reflexive pronouns, use of trite words and use of expressions with origins in bureaucracies.  Bureaucratic language adds little other than superfluous words to sentences, it often replaces clear language with obtuse constructions and, in some cases, it is grammatically incorrect.

Examples of overused language include:

With that being said
With that said
That being said
That said
Having said that
Going forward
Moving forward
Look
Listen
Iconic
Unpack
Amazing
In regards to
Here's the thing
Exactly
Absolutely
Get-go


Thursday, January 16, 2020

YALE FOREST BIRD POPULATIONS INCREASE AND SHIFT SPECIES



Everyone's been sharing this link with me: https://www.courant.com/…/hc-hm-birds-connecticut-in-declin…
It is a fine article, but as I pointed out to the author, like most everything in nature the situation is much, much more complicated than simply declines of bird species. From our work at Yale Forest, we know that Connecticut bird communities are extremely dynamic, with more that 50% turnover in 35 years and population increases actually outpacing decreases- climate change, habitat change, species moving into new habitats, competition, etc. etc. all appear to play roles. The graph shows Yale Forest population increases vs. decreases for species whose continental populations are (1) increasing, (2) decreasing and (3) stable. We will have an article out soon...


Monday, October 28, 2019

ESKIMO CURLEW RESEARCH NOW AVAILABLE

Plumage states of the Eskimo Curlew
Our Eskimo Curlew research is now available as an open access document at http://www.birdconservationresearch.org/…/eskimo%20curlew%2…
It investigates the external anatomy of males vs. females and adults vs. juveniles, and identifies two previously undescribed plumage states. One of these states (see photo) exhibits prominent y-shaped markings on the breast whereas the other exhibits linear markings. It also documents, based on specimen data, the species' historical distribution.

Thursday, October 24, 2019

YALE FOREST BIRDS SHOW POPULATION INCREASE


Bird populations at Yale Forest have increased since 1985, but the amount of variability among individual study sites has also increased. As the figure shows, surveys were duplicated each year to gain a perspective of survey variability.

Unlike continental trends, which show that birds have declined by 30%, forest birds in northeastern Connecticut have undergone a 20% increase. Read about this and more in Bird Conservation Research's October newsletter: http://www.birdconservationresearch.org/pdf/bcr%20newsletter%2021-4.pdf.

Wednesday, February 13, 2019

ENDANGERED SPECIES COURSE DEBUTS


The first of the presentations for Bird Conservation Research's new course on endangered species conservation are now available.  These presentations focus on the history of endangered species conservation, the philosophical underpinnings of these efforts and the role of environmental scale in endangered species designation.  These presentations may be viewed at the BCR web site by following this link to the slideshow page.  Scroll to the bottom of the page to see Endangered Species Conservation.



Tuesday, December 4, 2018

BIRD CONSERVATION CONTRIBUTIONS

Female Ruby-throated Hummingbird

Bird Conservation Contributions is the peer-reviewed scientific journal of Bird Conservation Research, Inc.  It is made available here through Arts and Academic Publishing.  The series consists of individually published papers on basic and applied avian research that have conservation implications.  Submissions may be data papers, syntheses or commentaries.  Submissions are welcome from anywhere in the world, and are particularly encouraged from women and minority authors, researchers at small and non-academic institutions, researchers who have single author contributions, researchers with limited publication budgets and new authors who may need assistance in achieving professional publication standards.  All submissions, correspondence and reviews are accomplished via the internet.  All published papers are open access. There are no page charges or author fees for accepted papers.

Saturday, September 22, 2018

MAPS FOR CONNECTICUT AND RHODE ISLAND FOREST BIRDS

Summer distribution of the Eastern Towhee (higher density in red regions).

Distributional maps for birds reviewed in Forest Birds of Connecticut and Rhode Island are now available in a new Bird Conservation Research, Inc. publication.  The maps are open access and may be viewed via Arts and Academic Publishing.  Distribution of habitat and community parameters like species richness are also mapped.  These maps provide the first ever view of the distribution of bird population densities across southern New England.  The maps were produced by Kyle Arvisais of the University of Maine School of Forestry.


Distribution of oak-dominated forest (higher density has larger dots).






Friday, April 27, 2018

ESKIMO CURLEW RESEARCH

Spring (green) and fall (red) locations for museum specimens of the Eskimo Curlew.



With examination of the specimen holdings at the U.S. National Museum and Yale Peabody Museum, our investigations into the external features of the Eskimo Curlew are drawing to a close.  To date, we have examined 86 specimens that were collected in spring, summer, fall and winter.  On each, we have made a series of measurements and also taken photographs of  breast, wing and back plumage. 

To examine differences in measurements, we used a statistical technique called discriminant function analysis.  This technique allows us to examine all measurements simultaneously.  Doing so has permitted us to conclude that males significantly differ from females in particularly bill and tail length.  We found no seasonal differences in measurements, however.  We are still working on comparing measurements of adults and juveniles.


To determine identity of adults and juveniles, we are scoring each specimen for a number of plumage traits, including shape, color, size and density of breast markings, feather edging of wing coverts and extent of spotting on back and scapular feathers.  Although this investigation is still ongoing, it so far appears that traditionally used means of aging individuals do not hold up to careful scrutiny.

In addition to examining specimens themselves, we are also studying the location data attached to each individual.  As traditionally thought, fall migration occurs principally through the Northeast, whereas spring migration occurs through the Great Plains.  Five late May specimens from Alaska provide evidence for a previously unconfirmed breeding population there, whereas specimens from western New York and Montreal provide evidence for a hypothesized fall migration corridor through the northeastern United States.

Friday, April 6, 2018

FOREST BIRDS OF CONNECTICUT AND RHODE ISLAND IN PRINT

The American Redstart was a common species of forest openings and forest borders.

Forest Birds of Connecticut and Rhode Island is presently available as an open source document through our publishing partner, Arts and Academic Publishing.  It will soon be available in print form as well, and before it is we wish to notify all that this is the final opportunity for sponsoring a species.  Individuals who sponsor species have their name added to the text under the species account that they choose.  They also receive a complimentary copy of the print version of the book.  To sponsor a species, go to our GoFundMe page or send an email to us at BCR.

Friday, March 23, 2018

DENSITY MAPS OF CT AND RI FOREST BIRDS

Summer bird density corresponds generally to the most densely forested regions.  Circles represent population densities at specific study sites.

BCR is presently working with a GIS specialist to turn our population data from the Forest Bird Survey of Connecticut and Rhode Island into density maps for the study area.  The resulting work will illustrate summer and winter habitat and community data as well as data for densities and distributions of individual species.  The resulting publication will serve as a companion to our recently release book, Forest Birds of Connecticut and Rhode Island, which is available via our publishing partner, Arts and Academic Publishing.  As with all products of BCR, including videos, educational documents and scientific papers, it is available as an open access document.


Wednesday, March 14, 2018

BIRDS IN AGRICULTURAL LANDSCAPES




Three tanks of  gas is my self-imposed limit- that point at which my shoulders and mind are tired enough to make continuing on less safe for something as strenuous as chain-sawing.  On this day, however, the third tank and four more hours of labor had gotten me to where I needed to be- at the completion of beating back decades of landscape neglect.  A profusion of multiflora rose, autumn olive, privet, burning bush, Japanese barberry, bittersweet, amelopsis and other non-native invasives had overrun the borders of the ten-acre Connecticut farm now operated by Bird Conservation Research, Inc. as a field station.

To be sure, such border creep into agricultural land is largely the consequence of seed planting by native birds that disperse the fruits and seeds of exotic plants.  However, such creep is not compatible with the goals of production agriculture, and our mission for the past four years has been to maximize wildlife values of landscapes within the constraints of an effectively run agricultural operation.  Such borders, although wildlife-planted, are far from having the optimal vegetation composition for these locations.

Now that these borders are cut back (although the gargantuan task of turning the resulting slash into wildlife brush piles remains ahead), we are examining available options for replanting the borders with superior vegetation.  The borders will shrink from their present 30-75 foot-wide swaths to a more modest but agriculturally practical 15 foot edge that is punctuated by mature trees.  The understory is to be converted from invasive exotics to high wildlife value natives, like our various species of evergreens, hollies, viburnums, dogwoods, shadbushes, cherries, roses and aronias, as well as to non-invasive cultivated plants that are also favored by wildlife.

It is important to recognize that wildlife values are not confined to those species that breed on the property, but also include those conferred by species that pass through the area- notably migratory birds.  Hence, plantings must have value at all seasons.  Species that flower early and late, species that have persistent overwintering fruit and species that offer substantial cover, roost sites and nest sites are the types of plants to be selected.

At present, the field station is home to species that successfully use agricultural landscapes like the American Woodcock (we are presently working on banding our local population).  It also serves as a migratory stopover (and possibly incipient nesting population) to such typically Midwestern species as the Vesper Sparrow (territorial males in early spring), Savannah Sparrow and Clay-colored Sparrow (present spring and fall).

American Woodcocks nest and hatch young well before the haying season and often build nests in the edge adjacent to hayfields.

Wednesday, February 21, 2018

EVOLUTIONARY ECOLOGY

The island-dwelling Nightingale Reed-warbler of the tropical Pacific exhibits the phenomenon of gigantism.

The next video in the AP Environmental Science topic The Living World is entitled Evolutionary Ecology.  The lesson begins by examining a series of specimens of the possibly extinct Eskimo Curlew.  Doing so demonstrates the existence of individual variation that cannot be accounted for by considering age or sex.  This individual variation may be acted upon by natural selection to yield evolutionary change.  The example of gigantism in the genetically isolated, island-dwelling Nightingale Reed-warbler is used as an example.  Other species, like the unrelated Gray Catbird exhibit traits like the reed-warbler, which provides an example of convergent evolution.  The video also explores coevolution- the influence of one species on the evolution of another.  The video concludes by examining the concepts of r an k selection- alternative ways that reproductive strategies may evolve.

All videos in this series are open access and may be viewed through Arts and Academic Publishing.  This particular one may be viewed by clicking below:

Wednesday, February 7, 2018

LANDSCAPE ECOLOGY


This infrared photo of a tidal wetland is overlain with maps of vegetation types.

The eleventh in the Living World series of videos compatible with the AP Environmental Science curriculum is entitled Landscape Ecology.  The program concludes discussion of the species-area effect by extending its implications to the study of island biogeography. These issues relate to the larger issue of landscape ecology- considering the geographical scale at which ecological phenomena are studied. It concludes by relating ecology to evolution through discussion of natural selection, mutation, fitness and genetic isolation.  This and all videos in this series are open access and may be viewed via Arts and Academic Publishing.

Wednesday, January 17, 2018

OPEN ACCESS ENVIRONMENTAL SCIENCE VIDEOS


The now lost Cathedral Pines old growth stand in Cornwall, CT is used as an example of inappropriate forest management practices. 

All videos in Arts and Academic Publishing’s environmental science video library are now available as open access materials for students and educators everywhere.  We here highlight the videos in the Land and Water Resources unit. 

This unit covers topics in natural resource management, such as forestry, deforestation effects, sustainable agriculture, integrated pest management,  water resource management, waste management, public lands, habitat restoration and habitat remediation.  Each topic is presented in a single video episode and follows the national AP Environmental Science curriculum.

All videos incorporate PowerPoint lecture notes, images from BCR’s vast photographic library and graphic displays that enhance understanding of the complex topics explored.



Tuesday, October 24, 2017

Forest Birds of Connecticut and Rhode Island now available


Into the Woods, by Barbara Lussier

Forest Birds of Connecticut and Rhode Island
Forest Birds of Connecticut and Rhode Island, the eight-year long summer and winter study of the population densities, distributions and habitat use by the forest birds of southern New England, is now available for free download.

We invite readers to become sponsors for individual species. You may do so by writing us your species choice at mail@birdconservationresearch.org. Upon receipt of your choice (please make a first, second and third choice in your message), your name will be added to the species account as a sponsor. Names of species sponsors will be updated daily on the downloadable book so that you may see which species have already been chosen. You will also receive a printed copy of the book as our gift upon completion of the species sponsor campaign. We request a donation of $125 to become a sponsor, and you may make your donation here.

The 251 page book may be accessed through Arts and Academic Publishing under the Bird Conservation Contributions tab.

Sunday, January 29, 2017

SPECIES DIVERSITY

The wet, high elevation limestone forests of Rota in the tropical Pacific are characterized by epiphytic ferns, fern allies and orchids.

The topic of species diversity is focused upon in this next episode of a video series designed to complement the AP Environmental Science curriculum.  It begins with an exploration of the scale at which diversity is considered,  discussing the concepts of alpha, beta and gamma diversity.  It also considers the components of diversity- species richness and species evenness.  

The video then goes on to examine methods of computing diversity.  It evaluates the uses and pitfalls of diversity characterization, including the loss of information that occurs by computing diversity indicies.

Still another diversity-related issue is the edge effect.  The video examines how diversity responds to the boundary between habitats and how certain species are edge specialists.  It also notes, however, that edges can have reduced habitat quality as well as higher rates of predator activity.

The video concludes by examining the species-area effect.  It considers the phenomenon of minimum habitat size and the role of chance in the accumulation of species by virtue of area.


This and other videos in this series are produced by the publishing partner of Bird Conservation Research, Inc- Arts and AcademicPublishing.


Tuesday, January 10, 2017

FOOD WEBS AND SPECIES DIVERSITY



Food webs are extensions of the concept of trophic levels- the compartmentalized view of how energy flows through ecoystems from primary producers to primary, secondary and tertiary consumers.  The food web concept clarifies that individual species can influence energy flow in more than one of these trophic levels.  These and related topics are the subject of the next video in a lecture series related to the AP Environmental Science national curriculum.  The video also reviews the concept of trophic efficiency- the percent of energy that is passed from one trophic level to the next, and compares the productivity of a variety of ecosystems on planet Earth.


The focus of the video then shifts to that of biological diversity.  It compares a system with few species in which some reach great abundance with a system housing many species in which no one assumes dominance.  It also examines the components of diversity- richness and evenness.  The video concludes by considering the patterns of diversity that may be viewed at large geographic scales.  This and other videos in this series are produced by the publishing partner of Bird Conservation Research, Inc.- Arts and Academic Publishing.

Monday, December 26, 2016

ENERGY FLOW THROUGH ECOSYSTEMS

Solar energy powers all life processes on Earth

Solar energy captured during the light-dependent reaction of photosynthesis is the ingredient that powers most ecosystem processes.  This energy is passed from trophic level to trophic level, fueling the emergence of virtually all life forms on Earth.  Energy is the theme of the next video in the AP Environmental Science topic of The Living World.  It is available through the publishing partner of Bird Conservation Research, Inc.: Arts and Academic Publishing.

The video begins by exploring climatic relationships among biomes through climatographs.  It then moves to a discussion of the light and dark reactions of photosynthesis and how these processes are used in producing living biomass.  It next considers the laws of thermodynamics and how these constrain energy flow through ecosystems.  Concepts relating to productivity are then reviewed, as is the transfer of energy through trophic levels.  The video concludes by following energy from primary producers to consumers to decomposers.