What do the following words and phrases have in common?

1. NEITHER ONE
2. REGRETS ONLY
3. BAD ODOR
4. MICROWAVE
5. INTERNAL
6. CONTRAVENE
7. BOWLED OVER
8. NEW RENTAL AGREEMENT

HINT:
Each clue word conceals a related word.

Answers:

Hidden in each clue word is the name of a bird:

1. neitHER ONe
2. rEGRETs only
3. baD ODOr
4. miCROWave
5. inTERNal
6. contRAVENe
7. bOWLed over
8. neW RENtal agreement

Credit:
NY Times Crossword
August 21, 1994
Ted Fulton
NESTLINGS