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Fireflies are really flying ____ that flash light to attract mates.
|
beetles
|
|
Crows caw, whereas ____ are larger and make croaking sounds.
|
caribou
|
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Penguins, emus, rheas, kiwis, and ____ are flightless birds.
|
ostriches
|
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Most common ____ breed on or near Iceland.
|
puffins
|
|
Arctic ____ have the longest migration journeys.
|
ravens
|
|
Lichen is a major food source for ____.
|
seahorses
|
|
Tree ____ are slow-moving mammals of tropical rainforests.
|
sloths
|
|
Female ____ transfer eggs into the brood pouches of males.
|
terns
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