The Fifty-first Supplement to The AOU Check-list

It’s that season, and the new Supplement to the AOU Check-list (still so quaintly spelled a century and a quarter after the first edition!) appeared at BioOne yesterday.

The news of a few species “splits” affecting birders in the US and Canada was not unexpected–the only thing surprising, and perhaps a little disappointing to a resolute non-scientist, was that there weren’t more. In any event, we now officially have two whip-poor-wills, Mexican Whip-poor-will and Eastern Whip-poor-will, and the old “winter” wren is now recognized as three species, two of which–Pacific Wren and the remarkably poorly named Winter Wren sensu novo strictoque–occur in North America. “Our” black scoter is split from the Old World species and renamed Melanitta americana, vindicating good old Swainson a hundred seventy-five years after he described it; its English name is apparently uncertain at the moment, though the copy of the Supplement I printed out today calls it, logically and straightforwardly, “American Scoter.”

While species determinations speak only to identity, genera are all about relationships, and this Supplement is full of new views about what belongs with what. Canyon, California, and Abert’s Towhees are moved over to Melozone, which they’ll be sharing with the tropical ground-sparrows; only the three rufous-sided and Green-tailed Towhees remain in the cheerful-sounding genus Pipilo.

There are some significant innovations in the warblers, too, both Old World and New. Here in North America, Vermivora is greatly diminished, now including, if I count right, only Blue-winged, Golden-winged, and the ghost of Bachman’s Warblers. The handsome old genus Oreothlypis is resurrected to contain all the other erstwhile vermies and two tropical “parulas,” Flame-throated and Crescent-chested Warblers; visually and intuitively, those latter two have always been thought of as intermediate between the parulas and the old-style Vermivora, so it’s nice to see them sharing a taxonomic drawer. I just wish that we could change their English names, too, to echo the genus name: wouldn’t it be nice to go out and see some Orange-crowned Mountain-Chats? And just imagine what high school football teams in Tennessee could do with it.

Another pair of warblers, the waterthrushes, have now got their own genus, Parkesia, bearing the name of one of the last century’s greatest museum men and warbler experts. Ovenbird stays behind to brandish its tail in Seiurus, no doubt to the posthumous frustration of Eliot Coues, who argued long and hard that it should by rights have been spelled Siurus.

I tremble to report it, but it’s official now: Aimophila, that wonderful ragbag genus of wonderful ragbag sparrows, has been dismantled. Here in Arizona, only Rufous-crowned Sparrow is still an Aimophila, our others moved into the revived genus Peucaea. Five-striped Sparrow, always an uncomfortable nomenclatural fit, has gone back to Amphispiza, joining once again the visually similar Sage and Black-throated Sparrows. (No action on the possible split of Sage into Interior Sage and Bell’s Sage Sparrows.)

These changes, of course, I take personal: my favorite bird in the world, Rufous-winged Sparrow, can no longer serve as the eponym for this b-log or my drowsy little guide service. What shall I do? Kenn suggested renaming it “Peucaea Perambulations,” but I think maybe I’ll just let people think that I can’t identify Rufous-crowned Sparrow and leave it at that.

The revisions don’t stop at the level of genus, either. There are eleven new families recognized, including the re-elevation of Osprey and the gnatcatchers to family status; the longspurs and white buntings also get their own family, Calcariidae (and McCown’s Longspur goes its own way generically once again).

The Old World “warblers,” a miscellaneous bunch if ever there was one,  are broken into many families: Cettiidae includes the bush warblers, Phylloscopidae the leaf warblers, Sylviidae the round-headed chattering warblers (now including Wrentit), and Acrocephalidae the reed warblers. Those new Eurasian families are followed in sequence by an American one, Donacobiidae: hurray for Donacobius, sometimes a wren, sometimes a thrasher, now confident enough to simply be itself.

Most far-reaching of all is the re-organization of a couple of non-passerine orders. Sunbittern and Kagu, two of the most extravagantly plumed birds anywhere, now get their own order, Eurypygiformes; I doubt that this particular innovation will last–higher categories generally want to be more densely populated–but that’s the solution of the moment. The falcons and the other diurnal raptors are split into two orders, falcons and caracaras keeping hold of the old Falconiformes and the rest inserted into a new Accipitriformes.

And then there are the storks and pelicans. Ciconiiformes relinquishes everything but the storks themselves; the herons and ibises are now part of the order Pelecaniformes, where they sit alongside the pelicans and form the suborders Ardeae (herons and  bitterns) and Threskiornithes (ibises and spoonbills).

The committee giveth and the committee taketh away, and the old totipalmate swimmers are now split up into three orders: the pelicans and herons (that phrase will take some getting used to!), the Phaethontiformes (tropicbirds), and the Suliformes (frigatebirds, boobies, and cormorants). When I was a boy, back before they’d invented DNA and chemistry and all that, we learned that orders were defined by foot characters: we’ve come a long ways!

And changes will continue. The committee rejected proposals to split the scrub-jays and the curve-billed thrashers, but watch the “pending” section of the committee’s web page for new proposals–and look forward to next July when the next Supplement will be published.

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Some Rare Bad Luck

The desert is a harsh place, even for those plants and animals “perfectly adapted” to life here in the southwest. This adult Cactus Wren in the neighbors’ yard somehow discovered the downside of nesting in the prickly protection of a cholla.

It’s astoundingly rare to see such a thing; I can’t remember ever having run across an impaled adult of this species. What makes me wonder most, though, is that this bird was stuck not on wing or tail–the appendages most likely to swipe carelessly across a cholla joint–but on its belly, as if it had been pressed into the bed of spines from above. Did one of the neighborhood Cooper’s Hawks force the bird to crouch at just the wrong moment?

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The New “Little Petersons”

“Veteran birders will know how to use this book.”

True now, true when a variation on the sentence first introduced the standard-setting second edition of Roger Tory Peterson’s Eastern field guide. But unlike the situation in 1947, the new 2010 editions of the Eastern and the Western guides won’t be judged by the standards of “veterans who have watched birds for years.” That segment of the market–a market and a segment both virtually invented by the Peterson enterprise more than three quarters of a century ago–will stick to Sibley, Nat Geo, and above all Pyle; but the new “little Petersons,” along with the single-volume North American guide published two summers ago, could play an important role in the formation of new birders and casual birders.

What that means for the reviewer is that these books are to be judged not by their exhaustive completeness and unfailing accuracy but rather by their clarity and appeal. In important ways, that is a more demanding standard; and the stakes are certainly higher, since these editions are likely to be the point of entry for many of those who take them to hand.

As is no less than expected of a Peterson guide, these books pass the appeal test with flying colors (the pun unintended but greatly appreciated). Slightly larger than a “normal” Peterson or the little Sibleys, the books will fit handily into a big pocket or a small pack for those inclined to carry them afield (and many of those who use these guides will carry them afield). Range maps, detailed and up-to-the-minute accurate, thanks largely to Paul Lehman, face the plates and then are reproduced in even greater detail in an appendix.

The images on the plates are very large and bright, most–but puzzlingly not all–of the colors more or less true. It must be repeated that many of Peterson’s birds just don’t look like birds, somehow, but as matrices for the famous field-mark arrows they’re just fine. I do wish that the Aubudon’s Warbler female in the Eastern guide looked less like a yellow-throated Myrtle, and that the parulids and emberizids had always been granted their tails. All of the plates should have white backgrounds, too, instead of the occasional sickly green.

Where these books disappoint is in their clarity. It is absolutely essential that books for beginners, or books likely to wind up in the hands of beginners, be comprehensible and informative; the early Peterson guides remain almost unexcelled in this, with barely a misplaced word to confuse even the neoest of birding phytes. Peterson at his estimable best as a writer was capable of a linear single-mindedness that leads the reader effortlessly, successfully to wherever he wanted her to go: the 1947 guide remains one of the brightest teaching texts around, even as its sophistication–considerable in its day–has inevitably faded.

Some of that Petersonian clarity still shines through the text in these new editions, but just as in the single-volume guide published in 2008, it is not consistently a character of the new books’ design and content. Both the Eastern and the Western volumes adopt the latest taxonomic innovations; but where Roger Tory Peterson would certainly have had something to say about the re-assignment of Piranga, and would certainly have moved the plate of those “tanagers” to a position closer to their rather similar cardinalid cousins, the new books, both of them, leave the red tanagers separated by many pages from the cardinals, the only indication that something has changed a useless reference to the plate where, after long interruption, the family picks up again.

Taxonomy and classification, important in helping beginners (and more advanced birders, too) organize their thoughts, are in general a weak point in these volumes. The discussion of geographic variation in the books’ front matter, taken from the one-volume guide, remains confusing and confused; surely those responsible for the updated text understand the relationship between a species and its subspecies, between subspecies and subspecies groups, but it’s really an inexcusable mess as presented here. Subspecies and morphs are also confused in the accounts for Krider’s Hawk: while the new Western guide (following what appears to be current thought) identifies that pale Plains beauty as a white morph of borealis Red-tailed Hawk, the eastern guide identifies it as  b o t h a morph and a separate subspecies.

English names are treated just as cavalierly: the captions to the plates for the scolopacids vary from “wader” to “sandpiper” to “snipe-like shorebird,” just as they did–misleadingly, confusingly, pointlessly–in the single-volume edition of 2008. Again, the new redactors had to know how to do this right; is doing it consistently wrong a mark of heedlessness or simply a lack of respect for the needs of thoughtful new birders, who are going to be left shaking their heads–perhaps even shelving their binoculars? These problems were pointed out in the reviews of the larger book, and to see them taken over into the smaller, regional volumes is a grave disappointment.

Just as serious, if perhaps less immediately noticeable, is an annoying tic in the texts. Again and again, the books inform the new birder of the existence of a problem–without offering any advice on how to solve it. Greater White-fronted Goose, we learn, might be confused with a domestic Graylag; but under neither species is there the least hint how to avoid that confusion. Snow and Ross’s Geese hybridize, but under neither species is there any indication how to recognize a possible hybrid. Female goldeneye are said to be identifiable by their wing pattern; but under neither species is there a clue about what precisely to look for. Empidonax differ, according to the introduction to the genus, in bill shape, tail length, and wing formula; but (especially in the Eastern guide) we are given virtually no guidance when trying to analyze a given bird on those criteria. Better to have kept silent than to promise, then to deny, a tidbit of knowledge.

A particularly egregious example is the Eastern guide’s treatment of the black corvids. At the bottom of the plate, drawings of the spread wings of Fish and American Crows are outfitted with arrows pointing to the slotted primaries of each. And the facing text? It tells us nothing to help the beginner understand what the differences are supposed to be. And worst of all, that facing page is half blank–space that could profitably and pleasingly have been used for a brief, simple discussion of the usefulness of wing formula, molt timing, and flight style in identifying the crows of the eastern US. Instead, we’re left with white paper and inscrutable images.

The latest incarnations of the Peterson guides are intended to be “not simply a commemoration but a useful, up-to-date resource.” They should be, and they could have been. But for all their attractiveness and convenience, these books are not the best choice for new or casual birders. Maybe the next editions will be.

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Some Upcoming Opportunities

I’ll be leading a few field trips over the next couple of months, and hope that those of you who are in the area will join us.

Southwest Wings, August 4-5: California Gulch for Five-striped Sparrows and other “Arizona specialties.”

Tucson Audubon, August 11: Puerto Peñasco for shorebirds and seabirds.

Nature Vancouver, September 6: Iona for shorebirds.

Nature Vancouver, October 2: Iona for shorebirds.

Nature Vancouver, October 6: Jericho Beach for migrants and wintering birds.

Nature Vancouver, October 22: Jericho Beach for migrants and wintering birds.

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The Birds of Il Poderino

The fields and orchards of our inn at Manciano were gratifyingly birdy, and by the time our week there had drawn to a close, we’d recorded the following species (the superscripts, which I’ll complete at some point, are page numbers in the field guide):

Common Pheasant Phasianus colchicus

Little Egret Egretta garzetta

Cattle Egret Bubulcus ibis

Gray Heron Ardea cinereus

Common Buzzard Buteo buteo

Common Kestrel Falco tinnunculus

Yellow-legged Gull Larus michahellis

Feral Pigeon Columba livia

Common Wood Pigeon Columba palumbus

Eurasian Collared Dove Streptopelia decaocto

European Turtle Dove Streptopelia turtur

Common Cuckoo Cuculus canorus

Tawny Owl Strix aluco

European Scops Owl Otus scops

Common Swift Apus apus

Eurasian Hoopoe Upupa epops

European Green Woodpecker Picus viridis

Eurasian Wryneck Jynx torquilla

Barn Swallow Hirundo rustica

Common House Martin Delichon urbicum

Common Nightingale Luscinia megarhynchos

Common Stonechat Saxicola torquatus

Common Blackbird Turdus merula

Blackcap Sylvia atricapilla

Sardinian Warbler Sylvia melanocephala

Melodious Warbler Hippolais polyglotta

Winter Wren Troglodytes troglodytes

Great Tit Parus major

European Blue Tit Cyanistes caeruleus

Long-tailed Tit Aegithalos caudatus

Red-backed Shrike Lanius collurio

Woodchat Shrike 382 Lanius senator

Common Magpie 360 Pica pica

Eurasian Jay 362 Garrulus glandarius

Western Jackdaw 364 Corvus monedula

Hooded Crow 366 Corvus cornix

Common Starling 370 Sturnus vulgaris

Eurasian Golden Oriole 370 Oriolus oriolus

Italian Sparrow 372 Passer italiae

Eurasian Tree Sparrow 372 Passer montanus

Common Chaffinch 376 Fringilla coelebs

European Goldfinch 380 Carduelis carduelis

European Serin 382 Serinus serinus

Join Marco and me in 2017!

 

 

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