What significant diving depth are Horned Grebes sometimes capable of reaching?
Answer
Over 30 feet
The text notes that they are capable of diving to significant depths, sometimes exceeding 30 feet.

Related Questions
What is the Horned Grebe commonly called in Eurasia?What physical characteristics define the Horned Grebe during the nesting season?How does the winter plumage of the Horned Grebe generally appear?Which ritualistic courtship behavior involves the pair diving and resurfacing while holding weeds?Where are Horned Grebe nests typically constructed?What aspect of post-hatching care suggests the immediate period is highly vulnerable for chicks?Due to their leg placement, how are Horned Grebes adapted regarding movement?What is the primary dietary focus of the Horned Grebe when wintering in the offshore marine environment?What significant diving depth are Horned Grebes sometimes capable of reaching?If a Horned Grebe is forced onto land, how does it typically move?