Hope that you are all safe and doing well. This post serves as continued intel on the hunt for these special pieces. As some of you know, the River of No Return BITT errors have been a significant point of interest for myself and others these past six months or so. Medical professionals have been tracking the Coronavirus, this author has been tracking (and buying) these error coins. Some of this information has been shared with others prior, but this post serves to re-establish and solidify the types and notable features of the BITT error varieties, expand upon past published information in this forum, and to relate key identification features related to these unique and special contemporary error set. I am pleased to announce (for all who might not have been up to speed), that the River of No Return Bird in the Tree Quarter is officially a twin 2019-P/2019-D error coin! Errors have been found from BOTH mints, proving that the variations in patterns have resulted from not just a single incident, but multiple dies and variations. The details and expanded list of types: RIVER OF NO RETURN "BIRD IN THE TREE" Error coins: 2019-P Philidelphia Mint Error Varieties: Type 1: Golden Eagle Edition (Varieties I, II) Type 2: Osprey Edition (Varieties I, II) Type 3: "Extra Branches" Type 4: Finch (very small bird in the tree) Type 5: Medium blob in tree, facing right Type 6: Medium blob in tree, facing left Type 7: big blob in tree, facing right (Baby Sasquatch in Tree ) 2019-D Denver Mint Errors: Thus far all 2019-D BITTs are rare. Like less than 10 examples have hit the market, all from the original lucky discoverer in Utah. Two varieties exist. I have been fortunate to secure for my collection multiple of the original Denver BITTs and can confirm their authenticity. Thus far, all 2019-D BITT's exhibit designs comparable to the Philidelphia Type 6. 2nd BITT variety adds a second confirmed identifying feature that the fellow who discovered it has dubbed the "Leaky Boat" double error. Not all BITT pieces are equal. Like the 2019-W quarters, a lot of pieces were dinged up in mint processing and didn't come out BU. For me, a well struck clear Golden Eagle Edition is far higher value than others. Any clean piece with BITT+Doubling is naturally worth more than it's 'normal' single error counterparts. Images to follow. Enjoy the hunt! All photos copyright by me. Written authorization needed for re-use.