{"product_id":"forever-stamps-2019-frogs-wildlife-series-first-class-postage","title":"Frogs 2019 Forever Stamps — Four Native Species, Pane of 16","description":"\u003ch2\u003eIssue facts\u003c\/h2\u003e\n\u003cp\u003eIssue Date: June 22, 2019\u003cbr\u003eFirst Day City: Detroit, MI\u003cbr\u003ePrinted by: Ashton Potter (USA) Ltd.\u003cbr\u003ePrinting Method: Offset\u003cbr\u003eFormat: Pane of 16\u003c\/p\u003e\n\u003ch2\u003eThe four species\u003c\/h2\u003e\n\u003cp\u003eSquirrel tree frog, northern leopard frog, American green tree frog, and Pacific chorus frog — the last still known to many people by its former name, the Pacific tree frog.\u003c\/p\u003e\n\u003ch2\u003eDeep history\u003c\/h2\u003e\n\u003cp\u003eFrogs have been around for a very long time. The oldest known frog fossil, \u003cem\u003eTriadobatrachus\u003c\/em\u003e, dates their lineage to the Early Triassic.\u003c\/p\u003e\n\u003ch2\u003eWhy biologists watch them\u003c\/h2\u003e\n\u003cp\u003eFrogs are indicator species: where they are plentiful, the ecosystem is generally in good shape. Two features make them that sensitive. They breathe through their skin, so anything in the water or air passes straight into them. And they live in two environments across a single lifetime, aquatic then terrestrial, which doubles their exposure to whatever is going wrong.\u003c\/p\u003e\n\u003ch2\u003eWhat they do for us\u003c\/h2\u003e\n\u003cp\u003eThey hold down insect populations, which is not a small service. They have also proven valuable in the laboratory — toxins from dart frogs and enzymes from northern leopard frogs are both under study for treatments of serious disease.\u003c\/p\u003e","brand":"Forever Stamp Center","offers":[{"title":"100 Stamps (5 Books)","offer_id":47100612870343,"sku":"ST19-A8-5","price":19.99,"currency_code":"USD","in_stock":true},{"title":"300 Stamps (15 Books)","offer_id":47100612903111,"sku":"ST19-A8-15","price":54.99,"currency_code":"USD","in_stock":true},{"title":"500 Stamps (25 Books)","offer_id":47100612935879,"sku":"ST19-A8-25","price":89.99,"currency_code":"USD","in_stock":true},{"title":"1000 Stamps (50 Books)","offer_id":47100612968647,"sku":"ST19-A8-50","price":149.99,"currency_code":"USD","in_stock":true},{"title":"5000 Stamps (250 Books)","offer_id":47100613001415,"sku":"ST19-A8-250","price":699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/6250\/4647\/files\/b-51-1-1-800x800_2045512b-c3ca-4210-bc48-b97b82da8ff0.jpg?v=1788604484","url":"https:\/\/www.foreverstampcenter.com\/products\/forever-stamps-2019-frogs-wildlife-series-first-class-postage","provider":"center","version":"1.0","type":"link"}