- The
Palearctic or
Palaearctic is a
biogeographic realm of the Earth, the
largest of eight.
Confined almost entirely to the
Eastern Hemisphere, it stretches...
-
Peter Carl
Ludwig Schwarz (Julian, O.S.: 23 May 1822, Danzig-Gdańsk – 17
September 1894, St. George's?,
buried in Tartu)(Gregorian, N.S.: 4 June 1822 –...
- very
noticeable in flight,
prevent confusion with
other widespread Palaeoarctic swallows such as the barn
swallow (Hirundo rustica), sand
martin (Riparia...
- polymorphism,
which can be
found in all
three tundra biomes of the
northern palaeoarctic.
Arctic foxes (Alopex lagopus) are dimorphic: the
common morph ('white')...
