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Looks like a fully engorged deer (black-legged) tick. Can't tell from your picture whether it's larva or nymph. Here's a size comparison photo: https://news.psu.edu/sites/default/files/styles/thr...
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Looks like a fully engorged deer (black-legged) tick. Can't tell from your picture whether it's larva or nymph. Here's a size comparison photo: https://news.psu.edu/sites/default/files/styles/thr...