The commonly heard check call, also frequently heard in flight (Jul, NJ)

Check call more rapidly given (Canada Goose in background, May, NJ).
Following are examples of various calls by males on breeding grounds. It appears that many of these "calls" are being used as alternatives to the full song.
Two males exchanging tyu calls (Gray Catbird mew in background, Jul, NJ).
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pee (with Tree Swallows, May, PA).

Squeaky see and descending hoo calls(Jul, NJ).
squeaky see call

hoo calls.

chrek and and a whistled see (Jun, NJ).
chrek

whistled see (note similarity to squeaky see).

Ket call by two males in the same tree (Feb, NJ).

A rapidly repeated, high pitched tip which reminds me of a Chimney Swift (Apr, PA).

This one was recorded in Maine, a nasal wee (Jul, ME).

Female Red-winged Blackbirds have their own calls. This is the commonly heard rattle(May, NJ).
time scale reducedA more gurgly call (May, NJ).
time scale reducedRusty Blackbirds have a check call, also the flight call, which is very similar to that of the Red-winged Blackbird (perched male, with song phrases, Apr, NJ).

The contact call between this pair of perched Rusty Blackbirds (male calls except fourth call by female) was a soft gup, lower than the similar tup call of Red-winged Blackbirds (Mar, PA).
Common Grackle, a buzzy trr call (Jul, ME)

A shorter version of this call repeated more rapidly (Apr, NJ).

A similar call (Mar, PA).

Several birds, with trr calls, rapidly repeated chack calls and squeaky song phrases (Apr, NJ).

Squeaky calls by Common Grackles are actually their song; compare with the song of Rusty Blackbird.
(Apr, NJ)

Rusty Blackbird song (migrants, Apr, NJ).

The Brown-headed Cowbird is an example of a species where the male and female "duet".
The rattle is the female, the squeaky note the male (May, NJ). The male song is these whistled notes preceded by gurgling sounds.
Sonagram showing male (two higher pitched notes) and rattle of female
time scale reducedBrown-headed Cowbird duetting pair (Apr, NJ).

This is an all too common sound heard in summer, the begging call of a juvenile cowbird (July, NJ)

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