![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZEi7qeEFaFPRKpTBlxu78JS9JIGtmPuf56TDTMdpjnCIUFG_rc4V39kfZ7FMbXLeR3Dx1nqCmbsGre4XWmn6zdKjSk50mHcY3YS0PEEuEEv32FVMwtWQmvBnhH7TL5_RlZgcB8DHHFYU/s320/LEAST+BITTERN+juv+Palmyra+NJ+8605+(3).wav.png)
Green Heron juvenile calling in flight, a soft tuk (July, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh1BhICgGv6kf6F4hvoMi1hMcFVXw5cAcjzVg7dA7bRZIWcRp_9AaYRhyn7uhmEh_gsch30fxQCY-o6TRmMtepi1uXzh6x-mVZpqVqCKI1QWhCKqn3sWW9jRxdWDDAlXxcf77IUHq9Y9LSJ/s320/GREEN+HERON+juv+PERT+PA+7509.wav.png)
Great Blue Heron fledglings, with background adult calls (June, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgttj387YC1HIvbp6eHmEShr51ZiRI7sim3GrYiJB1AbgCG_CWhDEA4-K72ineH3OLyctl2PTcrQcLB4cpVBViG_NZEMZjtuIYlyXbi7XitUzPOnHhiBTIEyZMurVki8lNKBrmyXTUnAH00/s320/GREAT+BLUE+HERON+juvs+East+Greenville+PA+12.30pm+06012019.png)
Begging calls of young Black-crowned Night-Herons at a colony (bubbling calls are Snowy Egret, May, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfAQIK68ldOfr761b5QVvdDSqMEJN5ke2XFZ-7JripVTFtNcs2vawY60EK7FlpT56jYn5EopcwaCL8hzK2sYNeWsQcCs5Uy-C0PO_WGxaHg25z0uBydeWzgKknyTAGN8jQH7eQJNaz4nwY/s1600/BLACK-CROWNED+NIGHT+HERON+colony+Heislerville+NJ+052212.WAV.png)
Clapper Rail chicks, a descending whistle (with Semipalmated Sandpipers, Aug, NJ).
Wood Duck very young ducklings (May, PA).
Older duckling (Aug, PA)
Canada Goose goslings with parents (May, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjn6ffAfcBLDoausTj_bDRc3bKGjAbgZR3Qr13YT3sSeLzgeyzjTxcErw9tFd3qT4PofvPYB1Br6cUhCtkcamtSubvZDWoNuKwR0BGRdC51PFLu9vQctio-VyEwjXJBeCGLMcDzCxnIksnv/s320/CANADA+GOOSE+chicks+Palmyra+NJ+05042012.WAV.png)
Juvenile Broad-winged Hawk; after about 30 days of age the call is the same as the adult (July, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh0h3Acppj-c02gIURO15FVA44nVAh2rM4weChYEwLBFvd4d_RBNBfHQqRE43Cw4hxSnjm3SrxvTLMdt0-XV1CVqyPuC4ftzx1o7p2c7b8GGUjC-lxNpZvQeZMEMDqN_LNslS7qBZq5UxiQ/s320/BROAD-WINGED+HAWK+juv+Glassboro+WMA+NJ+072912.WAV.png)
Immature Red-tailed Hawk (Aug, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMnsceCnN3nJp1a5HASyE3FxI9czN7FNYJcvbuMhrD-Z15fyVegc21cBlgBpTr8sPu8CCkQEEVPPDvDFwHuE4pMzzDd1ZyoMmUKYvY-AJEEG84Q8lhGzjpZnC-4yNM3t_UHEL6XuILliE/s320/RED-TAILED+HAWK+imm+perched+Palmyra+NJ+81407.wav.png)
Juvenile Osprey (with adult calls, Aug, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsf0gwYDZfsqAK1Nlxq9aMEoioliAv5lmeadWVcnkULGTcF_8DQMseIYDwB1byEhT2D7XVKI_BmUYTz4qUWBypdnx_iojxnNUPKjierkC8yBf4qfR3HHgsqSin3IkbKjpjcuYpJ9d07b55/s1600/Osprey1+juv+Brigantine+NJ+81910.png)
faster calls first 12s
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguh2ajdqm1S4LHJ9bw5ceTV1NnKv5HJypTVQc4DbcDqnHun1NxqPDdhTdJ4iuMViVCRd1a0B_9MJRr0wdteQDfOL8yMfZOqTPDPjifKzEFBzv34Fnr5RDK4nLM9TkvD4qnx5ENxaxbZwNJ/s320/OSPREY+ad+and+juv1+Brigantine+NJ+81910.WAV.png)
Spotted Sandpiper, fledgling old enough to flutter short distances (parent calls at beginning, June, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8G64dDM9CdfMkiIL0ROj30LcWvSTcrAobUFvz2-lNCgN3SunEd1zOFxfdZwG2c4_sO0ul11AcgBKklR6WxiCEfipsFXQ2z2kj7neU3P4WOQ3jqYM2HFniUnMt2u-mmpJ0PGWugqfba5W-/s320/SPOTTED+SANDPIPER+juv1+Skippack+PA+06222013.WAV.png)
Juvenile Herring Gull. The calls are surprisingly similar to those of juvenile Ospreys (Sep, ME).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQJL36yHypzVkk8loz9ydROudPH2jfg9lwprA0ET14oEumGhy0VsM0ipb3MYCIpsGNTlSBQGOgdtE9X9EEVe6bNuTKVuq8yirwishS6DWhJ5zTLjYsjqd-fmOMTvGaWsAjjHbfsJV7DVWz/s320/HERRING+GULL+juv++Seawall+ME+9109.png)
Juvenile Laughing Gull (Aug, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjJUEXynfZm3mdycZeqHc8MHILKTctR0NhRXoICa1yfaHrMLOmCMsPG2zGWz50FMBrdVXZCr7-co9ODrqlQULRGL3ATJ48KZ0rwvi8U67YDyE2HwgXDbKGFZwyYWj2r_gL235FI7GD3oSo/s320/LAUGHING+GULL+juv+Cape+May+NJ+6.50am+08282015.png)
Juvenile Forster's Tern in flight, with adult calls (Aug, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXn0YrD8bXmnW2P9ysEOYA_8eBvhviBRe0KuxR1DPOcSGINo2H46gyDIdl5q4F6fD_neL7smdcdHRIQ72cXGAlULc620BerqGv39fAb0keZlHj5XtrCvum3moq7Tw6H6TqeDFESXHtCgRH/s320/FORSTER'S+TERN+juv+Brigantine+NJ+81910.WAV.png)
Juvenile Caspian Tern in flight following an adult (Aug, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKpg00DeL2B1HGHbSTPsOVYdCbC4DrTDMPhIpPWy-Q_GdvAk0iZOb_8Q2shtcpsioPBlKfD0NKOx5RBd405cVDQV6rv3EQH5QyHCz5GDdYFKZYkYB49WyoCW7k1qxkgLtQ1Gr54CsU7yT6/s320/CASPIAN+TERN+juv+Green+Lane+PA+08242013+3.WAV.png)
Juvenile Royal Tern on beach with adult(Aug, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUJofJ9xqCDBizaSyg-MZBnaCPzRgmRAIvOBHqvsOpQAKSaBhLodq6L_ja6U2PdAK1Tenpu893PcRteIJ793bxN61mk5MWpHYZeH09jA3OJeaWAkmBqQhrzHH2zAXYJ5-GKQzk6xF3ouwa/s320/ROYAL+TERN+juv+Cape+May+NJ+7.14am+08272015.png)
Wild Turkey, young chicks (July, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1lKRqjtX8Hvwng0dvH8oigi_6oI_Vf18ehY3KXHyGlY1KybF3BwqZAH09pXuN_ej1DS5Xa5STRtyqNw-2ABPwZDg8c2bP443R_P2teDQjbWLij3jpwNDrhMr5QorM7dVbGsVn0brXebPa/s320/WILD+TURKEY+chicks+PERT+PA+07272013.png)
juveniles, old enough to fly (June, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOml8_JTIpc1WbTxRFkNf8ieR9XujjjpyVM8qzG06GjZ4e8OvbtBRUBfWvQUBzBQwGjsKa5unGezgQyp1FmqGsRRpnqGUFWhMq5hnbfnQkgCkTPrsbqkF0vKFgZdgSDPimeMM-OUBrEyA9/s320/WILD+TURKEY+juvs+PERT+PA+06162012.WAV.png)
Yellow-billed Cuckoo fledgling (with another in the background). Cuckoos are incredibly precocious, leaving the nest at 7 or 8 days, before they can fly. This bird crept through ground-cover (July, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiWrIuhCDDiLnjytNM9NCQ3VN3BKQ8OZtRy7OjmtUAnsPRwOxxtvx9ik5B0bcZ0yU6a8aCnaddI6DciquUa2fggOrj2-p_fXg5TPslNu95iI9e02z6QNeowXrhXuxcmLIJdB52gmReWPUFq/s320/YELLOW-BILLED+CUCKOO+juv+fledgling+unable+to+fly+Palmyra+NJ+071212.WAV.png)
Barred Owl, begging calls of juvenile (4.00am,Sep, ME).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsoPRA4WBzfDXqOhcHQHfBq1udkWbScZQXw24zM8s-Kr35RQP4Mkh1-I4JcYlfMjQtAWtKNZtDJh03skcXyROSo588hOWEgHCqt1uLmY1pvfqTytF8bv4wzpPakkXeKWELFs7OzRQrLZMd/s320/BARRED+OWL+juvenile+SW+Harbor+ME+9109+(2).wav.png)
Eastern Screech-Owl immature calling at dusk (May, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjNTLd5iM8Ki-c1hyezVRCNvOS8peUz5sZARHlbFZWAmPtBOq0rXK-CwPsq8F-zTR1zV3RB1XnblmcnmKCHY7ITjF8cEW2iPdyE2mfU8UMO6Ps0iB7nQ_WwTzoKBauF3Q-sU_0zQ7PYjG4o/s320/EASTERN+SCREECH+OWL+imm+PERT+PA+8.28pm+05242016.png)
Juvenile Downy Woodpeckers begin whinnying a couple of days before leaving the nest (nestling, June, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsraouRktRbpmUW8wL2haMluMs4L736XBAVYTusQNUnGsgXsY2OvKe-5Vt0_CShXiewu3sk45KCEsWrszmN3JTyjpVeIKWAJgYLQPfkH30tA2e6eV8Uq6vMkAUQBdD5HzZ3N0zJWw_gElp/s320/DOWNY+WOODPECKER+fledgling+Evansburg+SP+PA+8.11am+06062015.WAV.png)
whinny by fledgling (June, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEix3X9zLI4b-S9zI4yzTeEwp-DtKuzLlWV-bQRmPHrobQKKMDipDOUcdx8JaitnzNHIkchNqwOlHOeJO-d-qtI_URW6v5mdp8eCrZTQG48gZzcfUSzsCX7PI7540I43uaDX__XuGX7WaFqH/s320/DOWNY+WOODPECKER+juv+Elkins+Park+PA+62009.wav.png)
Juvenile Downy Woodpecker with adult (June, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgP6eub-s-ix34wlsXm2O78K9DThLki7iOl7XJuZtKJ9KDnbRI8J7m7s1hrfvKoIubvI0vX77kbTMHv6G5oFGPbXtlqV2K-Q9QSzCivVVdOQNE4wHDD1XWt4LYu4aQ2IsOLxLW8Jh1Voz63/s320/DOWNY+WOODPECKER+juv+Elkins+Park+PA+62009+(2).wav.png)
Juvenile Downy Woodpecker (with Gray Catbird, Aug, PA)
Juvenile Hairy Woodpecker with adult. The call of the young bird is higher (July, NJ).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCZQNOhbcHO11YS-2DXCjeC0ql38ckE0b3aDAokywdHCfVvPpdNX5U23d266Wc_dLrUeDuQWKr6lntT86wYm6FTmyUGGtYxW6KUY0dV_mGS-AgJ448EdiY27SSi-pjZgsZFudQzw4y-thp/s320/HAIRY+WOODPECKER+ad+and+juv+Huber+Preserve+NJ+62610.WAV.png)
Hairy Woodpecker (with adult, higher calls including rattles are by juvenile)
juvenile calls
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibOArjOWpWabxoFMbRqTvYbnLLehcdDcsKhF3VDXypAyaTl87DGlDlhJ4h1ouF_mbKfeQg2QP06fgtqYBORASd_RAL_-myMzWyLHe4-LWPslbnVqWWWwgML7OT-tWOrwIrjhduMpVz8xVK/s320/HAIRY+WOODPECKER+fledgling+Evansburg+SP+PA+7.46am+06062015.WAV.png)
juvenile rattle
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjIF82qOp0itpqNpzVeUGVfKpkN3wVFGo2_v_9gQRYLpqTVgE3eZHU_40bGPpVFQvtnH9bYSk4zjEGEUyINhPjCsRnbbHyQA_bDcPY0Van2S7rPRLxAu-VCsPLQBVCd7MCNl3LfvBX7ruXg/s320/HAIRY+WOODPECKER+fledgling+rattle+Evansburg+SP+PA+7.46am+06062015.WAV.png)
adult rattle
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgch5vE7IpoVz8rF8YL_x0p17hUn681aRoijzRo6lphUjX1jHkw_iLaKZePUtgDu0aVfPDm9f_ViE3xi3Gxr8JSbMXbwopbQfplXFMjjVw_2oqpsEo0_ES_KIuFhDi6LjEaI2vHbNencdF3/s320/HAIRY+WOODPECKER+adult+rattle+Evansburg+SP+PA+7.46am+06062015.WAV.png)
Various calls by a family of young Northern Flickers (juv Ovenbird also calling, July, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUBWYm6DPQldlE0PVIseFAk4uKQ2rOBGExH7HA83uoAwsnyAfwSrXNMFj1E1yxkkENdSq8HCqE0S2ZQBqBu381I2limIob5rVTYRmdtGtbtVySMf92oTnK-qgp7VFeCVxkKEe5x2-bUL4d/s320/NORTHERN+FLICKER+wheezy+juvs+Wissahickon+Creek+PA+7510.WAV.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3DV1IdMf_C_6dpyK4LF3kngk0e0SMaoTt4vuHf9PCMET8g6pzPIXYJOkF-Po7EWPwZ5Y5n3tPxUUHyIIp3Rk95bzQKYVc9VLlFczftoCG7B6V7fsiwzK51CKMr2dkto25D1JPzqSrcus5/s320/NORTHERN+FLICKER+wika+juvs+Wissahickon+Creek+PA+7510.WAV.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUyhfJ-gIQenm_OfkwNetWq4KN2c7kKPPzRcyV1zMjh6OVVFNxPKGOW9WoHQIJlMP0s1tj8TQbrwZpW7erv62GArAlV_O8S-lJaZqOBs37v86-81Ry4RKuUbwwXwDQzvgypivGFgpDr0K5/s320/NORTHERN+FLICKER+hissing+juvs+(1)+Wissahickon+Creek+PA+7510.WAV.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMbvZYkusmVn7UVhOXBKSbj3CVj8epLYfQd6tQfE2ZMV0ya10DFGtso4F1M3L5SEvAd_bz9eBtSdRDywEvwGwbR-2rwRxIsDBePPFkZIfgs39c8LoWc8ITOA_bPWTdMMbCBd0Q-1DeSsxY/s320/NORTHERN+FLICKER+keer+juvs+(1)+Wissahickon+Creek+PA+7510.WAV.png)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhUHs_6SqGF55PHXJeYyD5qMxT_pD8wB00Tzce_R6bThDbHTT1u_kaBi68jH-PZSTO6PQosUungP2-RcPrUy8xKJ8OMdbH0Ew7WOM4QLmtTGebUmjRJEFxJ-v6w4fSBXYoCFTO7sq6RJU9T/s320/NORTHERN+FLICKER+whurdle+juvs+(1)+Wissahickon+Creek+PA+7510.WAV.png)
Keer and begging calls (at point of being fed) by fledgling Northern Flicker at nesthole (June, PA).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-CqlbxDn989n3QMPApfDAoO818xt69n6oN36wo-A8HS-yuc_etHT6aEpcncqQkI6Qn6DTw05k7CaT8A8a35BGx3jbuV4-17d9g5YhTUluFM27Yv0KaDuUVyGyHNsVGDaeROoTvR5cX8qo/s320/NORTHERN+FLICKER+juv1+being+fed+at+nesthole+PERT+PA+06172012.WAV.png)
Red-bellied Woodpecker nestling calls (June, PA)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjg6c_Iljb_25mDLO-hU1LlTVbYCnLVE3o254-lX-a5tcjIVl51wmuFhH8zY2eLl7TItgEkTkelb43mvuewFH1gzQFhYlOhmblOzPR4TmJt0lgpXPp8giafU0HN7Denuf0FNKepos-w8XwH/s1600/RED-BELLIED+WOODPECKER+nestlings+Evansburg+SP+PA+06172013+(2).mp3.png)
Recent fledglings make the same calls (July, PA)
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