wasteful > desolate

4 For tumbling into mischief unespied.

For > [For fear of] mischief unespied > unseen mischief; mischief unobserved (by anyone who might be able to rescue them; "mischief" = misfortune, disaster, evil)

5 Worse is the danger hidden, than descried.

descried > [the danger descried]

6 Suddenly an innumerable flight 7 Of harmful fowls, about them fluttering, cried, 8 And with their wicked wings them oft did smite, 9 And sore annoyed, groping in that grisly night.

annoyed > vexed, harassed, discommoded grisly > horrible, fearsome

212.36

Euen all the nation of vnfortunate
2 And fatall birds about them flocked were,
Such as by nature men abhorre and hate,
4 The ill-faste Owle, deaths dreadfull messengere,
The hoars Night-rauen, trump of dolefull drere,
6 The lether-winged Bat, dayes enimy,
The ruefull Strich, still waiting on the bere,
8 The Whistler shrill, that who so heares, doth dy,
The hellish Harpies, prophets of sad destiny.

1 Even all the nation of unfortunate