| aspect | сторона = part or feature |
| breed | размножаться= to reproduce |
| diurnal | active during the day |
| endure | терпеть= to live under difficult conditions |
| evolve | развиваться = to develop gradually |
| fascinate | очаровывать = to interest greatly |
| feat | подвиг = difficult act or achievement |
| to fuel | запасаться топливом =to provide energy |
| hemisphere | one half of the Earth; also, one half of a sphere |
| imperative | крайне необходимый = priority ; an urgent need; |
| inhabit | обитать = to live in |
| migration | movement one place to another |
| navigation | finding the way from one place to another |
| nocturnal | active at night |
| observer | наблюдатель= a person who watches something |
| obscure | затемнять = to make difficult to see |
| optimal | best, most favorable; |
| species | type; a basic group in biological classification |
| stray | to leave the correct route; become separated from the group |
| windswept | unprotected from the wind |
