Bobolink
Dolichonyx oryzivorus
Measurements: Length: 5.9–8.3 in (15–21 cm) Weight: 1.0–2.0 oz (28–57 g) Wingspan: 10.6 inches (27 cm) Adults are 16–18 cm (6.3–7.1 in) long with short finch-like bills and weigh about 28 g (1 oz). Adult males are mostly black with creamy napes and white scapulars, lower backs, and rumps. Adult females are mostly light brown with black streaks on the back and flanks, and dark stripes on the head; their wings and tails are darker. Voice: Males have two song types, which they will sing both alone and together to make compound songs. Males sing both while perching and in flight, but compound songs are more likely during flight.
ID text from Wikipedia, CC BY-SA 4.0
Yellow-headed Blackbird
Xanthocephalus xanthocephalus
Yellow-headed blackbirds are relatively large blackbirds with large, yellow heads. They measure 8.3–10.2 in (21–26 cm) in length, with a wingspan of 16.5–17.3 in (42–44 cm) and a weight of 1.6–3.5 oz (44–100 g). Adults have a pointed bill. The adult male is mainly black with a yellow head and breast; they have a white wing patch sometimes only visible in flight. The adult female is mainly brown with a dull yellow throat and breast. Immature members of both sexes are brown with duller yellow plumage compared to adult males. Immature males also have some white patches on the wing. Voice: This bird's song resembles the grating of a rusty hinge. Male yellow-headed blackbirds have been observed to have two types of songs, an "accent song" and a "buzz song". The "buzz songs'' have much higher pitch than the accent song, and thus do not echo as well in the dense marshes they live in.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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