September, 1902 . 
'I'HK CONDOR 
I '3 
belt, many of which rise to a height of several thousand feet. The narrow open 
coast belt extends up the coast to the Columbia, with a few interruptions. Near 
Crescent City it assumes the form of a Transition coastal plain several miles in 
width. Diagnostic plants of these Transition areas are: 
Ace7' macrophyliiim 
Arctostaphylos 'iomentosa' 
Azalea occidoitalis 
BaccJiaris pilularis 
Brodlaea capitata 
Castaiiopsis chrysophylla 
Cea7iof/nis thy7'siJ]o7 7is 
Co7'7i7is Tiidtalli 
Co7'yl7is rost7'ata califo7'7iica 
F7'axi7i7is 07’ega7ia 
Ga7'7ya elll plica 
Opiilaste7' 777 07iogy7iiis 
My7'ica califo7'7iica 
Pop7ilus t7'ichoca7pa 
Os77ia7'07iia ce7'asifor77iis 
PseiidotsKga 777iic7'077aia 
0 It evens de7i si flora 
Rlwdode7idro7i califor7iic7wt {also bo7'eal') 
Rhus diversiloba 
Ribes 77ialvaceit77i {type') 
Rha77i7ms purshiatia 
Rebus 7irsi7ins 
Scrophitlaria califortiica 
Vacci7iiii77i ovatii77i 
ll777belliilaria califortiica { 7 'iver valleys 
07ily) 
Pliiladelplius [^le^ivisp) 
In the mountains just to the east of the redwood belt, Pseudotsuga 7nt<cro7iala 
is the prevailing forest tree — a typical Transition species, as are also Casta7?opsis 
clirysophylla, Qtterens califor7iica, Q7ie7'C7is de7isiflora, Qye7'cns chrysolepis, and A rbn- 
Itts 77ie7iziesi, which occurs here. Within about twenty-five miles of the coast in 
the latitude of Eureka, and fifteen in the latitude of Crescent City, the Humid 
Transition merges into the Arid Transition. 
The extensive lumbering activities in the vicinity of Humboldt Bay hav^e per- 
manently laid bare large tracts of country. The original Canadian nature of such 
tracts has been completely changed, and several species of transition plants, ori- 
ginally inconspicuous or wanting in the cold adverse conditions of the forest floor, 
have taken a new lease on life. These, with the intrusion of other Austral types 
have actually changed the zone. The open country has been rapidly invaded by 
Austral birds. Such species are: 
Lopliortyx califor7iicus 
Zetiaidiira 77iacroiira 
Cathartes aura 
Buteo b. calurus 
Falco sparveriiis 
Cliordeiles virgi7iianiis 
Selasphorns alle7ii 
Tyra7i7U(S verti calls 
Sayor7iis 7i. se77iiatra 
F77ipido7iax difficilis 
Corvus a77ierica7ius 
AgelaitfS g. calif or 7iicus {?) 
Stur7iella 771. 7ieglecta 
Scolecophagus cya7tocephalns 
Carpodactis 771. frotitalis 
Carpodaetts p. califor7iic7is 
Astragalitms t. salica777a7is 
Melospiza c. cleo7ie77sis 
Spizella s. arizoties 
Pi pi 1 0 777. or eg 077 Its 
Za777elodia 777ela77ocephala 
Cyattospiza 0777 x 770 
Petrocl7elido77 l7inifro77S 
Tacl7yci7teta bicolor 
Hel777i77tl70pl7ila c. I7itesce7is 
De7idroica aestiva 
Cl7a 777cea f phcea 
Sialia 777. occidetilalis 
These species, originally restricted to the narrow river valleys and open coast 
belt have since acquired a much wider distribution in this region. Many species 
have undoubtedly greatly increased in numbers since the advent of settlers, and 
possibly a few are recent intrusions. 
The Canadian, in a weakened form is represented by a very restricted area, 
which, year by year is becoming smaller, and may ultimately disappear altogether. 
