Little Grebe
Tachybaptus ruficollis
The little grebe is a small water bird with a pointed bill. The adult is unmistakable in summer, predominantly dark above with its rich, rufous colour neck, cheeks and flanks, and bright yellow gape. The rufous is replaced by a dirty brownish grey in non-breeding and juvenile birds. Juvenile birds have a yellow bill with a small black tip, and black and white streaks on the cheeks and sides of the neck as seen below. This yellow bill darkens as the juveniles age, eventually turning black in adulthood.
ID text from Wikipedia, CC BY-SA 4.0
Pied-billed Grebe
Podilymbus podiceps
Pied-billed grebes are small, stocky, and short-necked. They are 31–38 cm (12–15 in) in length, with a wingspan of 45–62 cm (18–24 in) and weigh 253–568 g (8.9–20.0 oz). They are mainly brown, with a darker crown and back. Their brown color serves as camouflage in the marshes they live in. They do not have white visible under their wings when flying, like other grebes. Their undertail is white and they have a short, blunt chicken-like bill that is a light grey color, which in summer is encircled by a broad black band (hence the name). In the summer, its throat is black. Voice: Its call is unique, loud and sounds like a "whooping kuk-kuk-cow-cow-cow-cowp-cowp". Its call is similar to the yellow-billed cuckoo.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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